DI Dr. Thomas Rath

Thomas Rath studied Industrial Chemistry at Graz University of Technology. In 2008, he completed his PhD focusing on hybrid nanomaterials for solar cell applications at the Institute for Chemistry and Technology of Materials under the supervision of Prof. Franz Stelzer. After that, he joined the Christian Doppler Laboratory for Nanocomposite Solar Cells headed by Prof. Gregor Trimmel as postdoctoral research associate. Within this industry-driven research project, his focus was on the development of roll-to-roll processable materials for polymer/nanoparticle hybrid solar cells and the optimization of the materials and solar cells regarding power conversion efficiency and stability.

From 2013-2015 he was a postdoctoral research associate in the group of Dr. Saif Haque at Imperial College London (Department of Chemistry and Centre for Plastic Electronics) working on the Erwin Schrödinger Fellowship Project “Chemical Interface Tailoring in Hybrid Solar Cells” funded by the Austrian Science Fund (FWF).

In 2015, he moved back to Austria. Since then, he is continuing his research on solution processable hybrid and organic solar cells at Graz University of Technology and since 2019, he is a Senior Scientist at the ICTM.

His main research interests include:

  • Organic and hybrid non-toxic absorber materials for solar cell applications (novel solution-based synthesis and processing routes, X-ray scattering-based characterisation, interface aspects)
  • Understanding the correlations between material and interface properties and the photovoltaic performance and lifetime in organic solar cells
  • Lead-free perovskite-based solar cells
  • Precursor-based synthesis of semiconducting metal sulfide films for PV applications and their characterisation

Articles in peer reviewed journals (since 2013)

The corresponding authors are underlined.


69) Honeycomb-structured copper indium sulfide thin films obtained via a nanosphere colloidal lithography method
Efthymia Vakalopoulou, Thomas Rath, Fernando Gustavo Warchomicka, Francesco Carraro, Paolo Falcaro, Heinz Amenitsch, Gregor Trimmel
Materials Advances 2022, 3, 2884-2895

68Metal Sulfide Thin Films with Tunable Nanoporosity for Photocatalytic Applications
Efthymia Vakalopoulou, Thomas Rath, Marianne Kräuter, Ana Torvisco, Roland C. Fischer, Birgit Kunert, Roland Resel, Hartmuth Schröttner, Anna Maria Coclite, Heinz Amenitsch, Gregor Trimmel
ACS Appl. Nano Mater. 2022, 5, 1508-1520.

67) Wide-bandgap organic solar cells with a novel perylene-based non-fullerene acceptor enabling open-circuit voltages beyond 1.4 V
Jakob Hofinger, Stefan Weber, Felix Mayr, Anna Jodlbauer, Matiss Reinfelds, Thomas Rath, Gregor Trimmel and Markus C. Scharber
J. Mater. Chem. A, 2022,10, 2888-290


66) Recent progress in the design of fused-ring non-fullerene acceptors – Relations between molecular structure and optical, electronic and photovoltaic properties
Bettina Schweda, Matiss Reinfelds, Petra Hofstadler, Gregor Trimmel, Thomas Rath
ACS Appl. Energy Mater. 2021, 4, 11899-11981

65) A pyrrolopyridazinedione-based copolymer for fullerene-free organic solar cells
Astrid-Caroline Knall, Samuel Rabensteiner, Sebastian F. Hoefler, Matiss Reinfelds, Mathias Hobisch, Heike M.  A. Ehmann, Nadiia  Pastukhova, Egon  Pavlica, Gvido  Bratina, Ilie  Hanzu, Shuguang Wen, Renqiang Yang, Gregor Trimmel, Thomas Rath
New J. Chem. 2021, 45, 1001-1009

64) The electron beam freeform fabrication of NiTi shape memory alloys. Part I: Microstructure and physical–chemical behaviour
Rafael Paiotti Marcondes Guimaraes, Florian Pixner, Gregor Trimmel, Josefine Hobisch, Thomas Rath, Fernando Fernandez, Norbert Enzinger, Sergio T. Amancio-Filho
Proc. Inst. Mech. Eng. Pt. L-J. Mater.-Design Appl. 2021, 235, 709-716

63) Benefits of direct electron detection and PCA for EELS investigation of organic photovoltaics materials
Georg Haberfehlner, Sebastian Franz Höfler, Thomas Rath, Gregor Trimmel, Gerald Kothleitner, Ferdinand Hofer
Micron. 2021, 140, 102981


62) A New Solar-Cell Battery Hybrid Energy System: Integrating Organic Photovoltaics with Li-Ion and Na-Ion Technologies
Sebastian Hoefler, Roman Zettl, Daniel Knez, Georg Haberfehlner, Ferdinand Hofer, Thomas Rath, Gregor Trimmel, H. Martin R. Wilkening, Ilie Hanzu
ACS Sustainable Chem. Eng. 2020, 8, 19155–19168

61) Synthesis and characterization of zinc di(O-2,2-dimethylpentan-3-yl dithiocarbonates) bearing pyridine or tetramethylethylenediamine coligands and investigation of their thermal conversion mechanisms towards nanocrystalline zinc sulfide.
Efthymia Vakalopoulou, Christine Buchmaier, Andreas Pein, Robert Saf, Roland C. Fischer, Ana Torvisco, Fernando Warchomicka, Thomas Rath, Gregor Trimmel
Dalton Trans. 2020, 49, 14564-14575

60) Comparison of fluorene, silafluorene and carbazole as linkers in perylene monoimide based non-fullerene acceptors
Stefan Weber, Jakob Hofinger, Thomas Rath, Matiss Reinfelds, David Pfeifer, Sergey M. Borisov, Peter Fürk, Heinz Amenitsch, Markus C. Scharber, Gregor Trimmel
Materials Advances 2020, 1, 2095 - 2106


59) Improved Charge Separation and Photovoltaic Performance of BiI3 Absorber Layers by Use of an in Situ Formed BiSI Interlayer
Bowon Yoo, Dong Ding, Jose M. Marin-Beloqui, Luis Lanzetta, Xiangnan Bu, Thomas Rath, Saif A. Haque
ACS Appl. Energy Mater.2019, 2, 7056-7061

58) Elucidation of Donor:Acceptor Phase Separation in Nonfullerene Organic Solar Cells and Its Implications on Device Performance and Charge Carrier Mobility
Sebastian F. Hoefler, Georg Haberfehlner, Thomas Rath, Andreas Keilbach, Mathias A. Hobisch, Alex Dixon, Egon Pavlica, Gvido Bratina, Gerald Kothleitner, Ferdinand Hofer, Gregor Trimmel
ACS Appl. Energy Mater.2019, 2, 7535-7545

57) Dependence of material properties and photovoltaic performance of triple cation tin perovskites on the iodide to bromide ratio
Stefan Weber, Thomas Rath, Birgit Kunert, Roland Resel, Theodoros Dimopoulos, Gregor Trimmel
Monatsh.Chem. 2019, 150, 1921–1927

56) Elemental Nanoanalysis of Interfacial Alumina−Aryl Fluoride Interactions in Fullerene-Free Organic Tandem Solar Cells
Sebastian F. Hoefler, Georg Haberfehlner, Thomas Rath, Roberto Canteri, Mario Barozzi, Ferdinand Hofer, Gregor Trimmel
Adv.Mater.Interf., 2019, 1901053, 1-9

55) Modification of NiOx hole transport layers with 4-bromobenzylphosphonic acid and its influence on the performance of lead halide perovskite solar cells
Jimmy Mangalam, Thomas Rath, Stefan Weber, Birgit Kunert, Theodoros Dimopoulos, Alexander Fian, Gregor Trimmel
J Mater Sci: Mater Electron, 2019, 30, 9602–9611.

54) Photovoltaic Properties of a Triple Cation Methylammonium/Formamidinium/Phenylethylammonium Tin Iodide Perovskite
Thomas Rath, Jasmin Handl, Stefan Weber, Bastian Friesenbichler, Peter Fürk, Lukas Troi, Theodoros Dimopoulos, Birgit Kunert, Roland Resel, Gregor Trimmel
J. Mater. Chem. A 2019,7, 9523-9529

53) Synthesis of a tetrazine-quaterthiophene copolymer and its optical, structural and photovoltaic properties
Astrid-Caroline Knall, Sebastian Franz Hoefler, Manuel Hollauf, Ferula Thaler, Sven Noesberger, Ilie Hanzu, Heike Ehmann, Mathias Hobisch, Stefan Spirk, Shuguang Wen, Renqiang Yang, Thomas Rath, Gregor Trimmel
J. Mater. Sci. 2019, 54, 10065–10076.

52) The effect of alkylthio substituents on the photovoltaic properties of conjugated polymers
Yi Li, Yuancong Zhong, Huanxiang Jiang, Thomas Rath, Qian Wang, Heike M. A. Ehmann, Gregor Trimmel, Shuguang Wen, Yong Zhang, RenqiangYang
Organic Electronics, 2019, 6, 50-55.

51) A Benzobis(thiazole)-Based Copolymer for Highly Efficient Non-Fullerene Polymer Solar Cells
Shuguang Wen, Yi Li, Thomas Rath , Yonghai Li, Yao Wu, Xichang Bao, Liangliang Han, Heike Ehmann, Gregor Trimmel, Yong Zhang, and Renqiang Yang
Chem. Mater., 2019, 31, 919–926.

50. Ligand-free preparation of polymer/CuInS2 nanocrystal films and the influence of 1,3‑benzenedithiol on their photovoltaic performance and charge recombination properties
T. Rath, D. Scheunemann, R. Canteri, H. Amenitsch, J. Handl, K. Wewerka, G. Kothleitner, S. Leimgruber, A.-C. Knall, S. A. Haque, J. Mater. Chem. C, 2019, 7, 943-952

49. Influence of the Iodide to Bromide Ratio on Crystallographic and Optoelectronic Properties of Rubidium Antimony Halide Perovskites
S. Weber, T. Rath, K. Fellner, R. Fischer, R. Resel, B. Kunert, T. Dimopoulos, A. Steinegger, G. Trimmel, ACS Appl. Energy Mater., 2019, 2, 539-547.

48     Hot injection synthesis of CuInS2 nanocrystals using metal xanthates and their application in hybrid solar cells
V. Perner, T. Rath, F. Pirolt, O. Glatter, K. Wewerka, I. Letofsky-Papst, P. Zach, M. Hobisch, B. Kunert, G. Trimmel, New J. Chem., 2019, 43, 356-363

47    Multi-layered nanoscale cellulose/CuInS2 sandwich type thin films
M. Weißl, T. Rath, J. Sattelkow, H. Plank, S. Eyley, W. Thielemans, G. Trimmel, S. Spirk
Carbohydr. Polym. 2019, 203, 219–227.


46. A Zero-Dimensional Mixed-Anion Hybrid Halogenobismuthate(III) Semiconductor: Structural, Optical and Photovoltaic Properties
S. F. Hoefler, T. Rath, R. Fischer, C. Latal, D. Hippler, A. Koliogiorgos, I. Galanakis, A. Bruno, A. Fian, T. Dimopoulos, G. Trimmel, Inorg. Chem., 2018, 57, 10576–10586.

45. Efficient Hybrid Solar Cells Based on Solution Processed Mesoporous TiO2/Tin(II) Sulfide Heterojunctions
D. Ding, T. Rath, L. Lanzetta, J. M. Marin-Beloqui, S. A. Haque, ACS Appl. Energy Mater., 2018, 1, 3042-3047.

44. The Effect of Polymer Molecular Weight on the Performance of PTB7-Th:O-IDTBR Non-Fullerene Organic Solar Cells
S. F. Hoefler, T. Rath, N. Pastukhova, E. Pavlica, D. Scheunemann, S. Wilken, B. Kunert, R. Resel, M. Hobisch, S. Xiao, G. Bratina, G. Trimmel, J. Mater. Chem. A, 2018, 6, 9506-9516.

43. Enhanced Performance of Germanium Halide Perovskite Solar Cells through Compositional Engineering
I. Kopacic, B. Friesenbichler, S. F. Hoefler, B. Kunert, H. Plank, T. Rath, G. Trimmel, ACS Appl. Energy Mater., 2018, 1, 343-347.

42. Investigation of NiOx-hole transport layers in triple cation perovskite solar cells
S. Weber, T. Rath, J. Mangalam, B. Kunert, A. M. Coclite, M. Bauch, T. Dimopoulos, G. Trimmel, J. Mater. Sci. Mater. Electron., 2018, 29, 1847-1855.


41. Nickel sulfide thin films and nanocrystals synthesized from nickel xanthate precursors
C. Buchmaier, M. Glänzer, A. Torvisco, P. Pölt, K. Wewerka, B. Kunert, K. Gatterer, G. Trimmel, T.  Rath, J. Mater. Sci., 2017, 52, 10898-10914. DOI: 10.1007/s10853-017-1265-5

40. Progress on lead-free metal halide perovskites for photovoltaic applications: a review
S. F. Hoefler, G. Trimmel, T. Rath, Monatsh. Chem., 2017, 148, 795-826. DOI:10.1007/s00706-017-1933-9

39. Synthesis of a conjugated pyrrolopyridazinedione–benzodithiophene (PPD–BDT) copolymer and its application in organic and hybrid solar cellsA.-C. Knall, A. O. F. Jones, B. Kunert, R. Resel, D. Reishofer, P. W. Zach, M. Kirkus, I. McCulloch, T. Rath, Monatsh. Chem., 2017, 148, 855-862. DOI:10.1007/s00706-017-1949-1

38. Biobased Cellulosic–CuInS2 Nanocomposites for Optoelectronic Applications
D. Reishofer, T. Rath, H. M. Ehmann, C. Gspan, S. Dunst, H. Amenitsch, H. Plank, B. Alonso, E. Belamie, G. Trimmel, S. Spirk, ACS Sustainable Chem. Eng. 2017, 5, 3115-3122. DOI: 10.1021/acssuschemeng.6b02871


37. Room temperature synthesis of CuInS2 nanocrystals
C. Buchmaier, T. Rath, F. Pirolt, A.-C. Knall, P. Kaschnitz, O. Glatter, K. Wewerka, F. Hofer, B. Kunert, K. Krenn, G. Trimmel, RSC Adv., 2016, 6, 106120-106129. DOI: 10.1039/C6RA22813E

36. A comparison of copper indium sulfide-polymer nanocomposite solar cells in inverted and regular device architecture
S. Dunst, T. Rath, A. Reichmann, H.-T. Chien, B. Friedel, G. Trimmel, Synt. Met., 2016, 222, 115-123. DOI: 10.1016/j.synthmet.2016.04.003


35. Structural, optical and charge generation properties of chalcostibite and tetrahedrite copper antimony sulfide thin films prepared from metal xanthates
T. Rath, A. J. MacLachlan, M. D. Brown, S. A. Haque, J. Mater. Chem. A, 2015, 3, 24155-24162. DOI: 10.1039/C5TA05777A

34. Formation of porous SnS nanoplate networks from solution and their application in hybrid solar cells
T. Rath, L. Gury, I. Sánchez-Molina, L. Martínez, S. A. Haque, Chem. Commun., 2015, 51, 10198-10201. DOI: 10.1039/c5cc03125g

33. The role of oxygen in the degradation of methylammonium lead trihalide perovskite photoactive layers
N. Aristidou, I. Sánchez-Molina, T. Chotchuangchutchaval, M. Brown, L. Martínez, T. Rath, S. A. Haque, Angew. Chem. Int. Ed. 2015, 54, 8208-8212. DOI: 10.1002/anie.201503153

32. Polymer/nanocrystal hybrid solar cells: Influence of molecular precursor design on film nanomorphology, charge generation and device performanceA. J. MacLachlan, T. Rath, U. B. Cappel, S. A. Dowland, H. Amenitsch, A.-C. Knall, C. Buchmaier, G. Trimmel, J. Nelson, S. A. Haque, Adv. Funct. Mater. 2015, 25, 409-420. DOI: 10.1002/adfm.201403108

31. Investigation on the formation of copper zinc tin sulphide nanoparticles from metal salts and dodecanethiolA. Pateter, W. Haas, B. Chernev, B. Kunert, R. Resel, F. Hofer, G. Trimmel, T. Rath, Mater. Chem. Phys. 2015, 149, 94-98. DOI: 10.1016/j.matchemphys.2014.09.046


30. Nanoimprinted comb structures in a low bandgap polymer: Thermal processing and their application in hybrid solar cells
S. Dunst, T. Rath, A. Radivo, E. Sovernigo, M. Tormen, H. Amenitsch, B. Marmiroli, B. Sartori, A. Reichmann, A.-C. Knall, G. Trimmel, ACS Appl. Mater. Interfaces, 2014, 6, 7633-7642. DOI: 10.1021/am5009425

29. Flexible polymer/copper indium sulfide hybrid solar cells and modules based on the metal xanthate route and low temperature annealing
C. Fradler, T. Rath, S. Dunst, I. Letofsky-Papst, R. Saf, B. Kunert, F. Hofer, R. Resel, G. Trimmel, Sol. Energy Mater. Sol. Cells, 2014, 124, 117-125. DOI: 10.1016/j.solmat.2014.01.043

28. Real time X-ray scattering study of the formation of ZnS nanoparticles using synchrotron radiation
T. Rath, J. Novák, H. Amenitsch, A. Pein, E. Maier, W. Haas, F. Hofer, G. Trimmel, Mater. Chem. Phys., 2014, 144, 310-317. DOI: 10.1016/j.matchemphys.2013.12.045

27. Worldwide outdoor round robin study of organic photovoltaic devices and modules
M. V. Madsen, S. A. Gevorgyan, R. Pacios, J. Ajuria, I. Etxebarria, J. Kettle, N. D. Bristow, M. Neophytou, S. A. Choulis, L. R. Stolz, T. Yohannes, A. Cester, P. Cheng, X. Zhan, J. Wu, Z. Xie, W.-C. Tu, J.-H. He, C. J. Fell, K. Anderson, M. Hermenau, D. Bartesaghi, L. Jan Anton Koster, F. Machui, I. González-Valls, M. Lira-Cantu, P. P. Khlyabich, B. C. Thompson, R. Gupta, K. Shanmugam, G. U. Kulkarni, Y. Galagan, A. Urbina, J. Abad, R. Roesch, H. Hoppe, P. Morvillo, E. Bobeico, E. Panaitescu, L. Menon, Q. Luo, Z. Wu, C. Ma, A. Hambarian, V. Melikyan, M. Hambsch, P. L. Burn, P. Meredith, T. Rath, S. Dunst, G. Trimmel, G. Bardizza, H. Müllejans, A. E. Goryachev, R. K. Misra, E. A. Katz, K. Takagi, S. Magaino, H. Saito, D. Aoki, P. M. Sommeling, J. M. Kroon, T. Vangerven, J. Manca, J. Kesters, W. Maes, O. D. Bobkova, V. A. Trukhanov, D. Y. Paraschuk, F. A. Castro, J. Blakesley, S. M. Tuladhar, J. A. Röhr, J. Nelson, J. Xia, E. A. Parlak, T. A. Tumay, H.-J. Egelhaaf, D. M. Tanenbaum, G. Mae Ferguson, R. Carpenter, H. Chen, B. Zimmermann, L. Hirsch, G. Wantz, Z. Sun, P. Singh, C. Bapat, T. Offermans, F. C. Krebs, Sol. Energy Mater. Sol. Cells, 2014, 130, 281-290. DOI: 10.1016/j.solmat.2014.07.021

26. Influence of TiOx and Ti cathode interlayers on the performance and stability of hybrid solar cells
S. Dunst, T. Rath, S. Moscher, L. Troi, M. Edler, T. Griesser, G. Trimmel, Sol. Energy Mater. Sol. Cells, 2014, 130, 217-224. DOI: 10.1016/j.solmat.2014.06.044

25. In situ syntheses of semiconducting nanoparticles in conjugated polymer matrices and their application in photovoltaics
T. Rath, G. Trimmel, Hybrid Mater., 2014, 1, 15-36. DOI: 10.2478/hyma-2013-0003


24. Bismuth sulphide–polymer nanocomposites from a highly soluble bismuth xanthate precursor
V. Kaltenhauser, T. Rath, W. Haas, A. Torvisco, S. K. Müller, B. Friedel, B. Kunert, R. Saf, F. Hofer, G. Trimmel, J. Mater. Chem. C, 2013, 1, 7825-7832. DOI: 10.1039/c3tc31684j

23. Influence of morphology and polymer:nanoparticle ratio on device performance of hybrid solar cells - an approach in experiment and simulation
M. Arar, M. Gruber, M. Edler, W. Haas, F. Hofer, N. Bansal, L. X. Reynolds, S. A. Haque, K. Zojer, G. Trimmel, T. Rath, Nanotechnology, 2013, 24, 484005. DOI: 10.1088/0957-4484/24/48/484005

22. Direct extreme UV-lithographic conversion of metal xanthates into nanostructured metal sulfide layers for hybrid photovoltaics
T. Rath, C. Padeste, M. Vockenhuber, C. Fradler, M. Edler, A. Reichmann, I. Letofsky-Papst, F. Hofer, Y. Ekinci, T. Griesser, J. Mater. Chem. A, 2013, 1, 11135-11140. DOI: 10.1039/c3ta12592k

21. Exploring polymer/nanoparticle hybrid solar cells in tandem architecture
V. Kaltenhauser, T. Rath, M. Edler, A. Reichmann, G. Trimmel, RSC Adv., 2013, 3, 18643-18650. DOI: 10.1039/c3ra43842b

20. Solution-processed small molecule/copper indium sulfide hybrid solar cells
T. Rath, V. Kaltenhauser, W. Haas, A. Reichmann, F. Hofer, G. Trimmel, Sol. Energy Mater. Sol. Cells, 2013, 114, 38-42. DOI: 10.1016/j.solmat.2013.02.024

19. Solution processed Cu2ZnSnS4 thin films for photovoltaic applications from metal xanthate precursors
A. Fischereder, A. Schenk, T. Rath, W. Haas, S. Delbos, C. Gougaud, N. Naghavi, A. Pateter, R. Saf, D. Schenk, M. Edler, K. Bohnemann, A. Reichmann, F. Hofer, G. Trimmel, Monatsh. Chem. 2013, 144, 273-283. DOI: 10.1007/s00706-012-0882-6

For a complete list of publications, see the researcher ID or the Google Scholar entry of Thomas Rath.