Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 84: Focus Session (CPP with HL): Hybrid photovoltaics and perovskites II

HL 84.9: Vortrag

Donnerstag, 19. März 2015, 17:45–18:00, C 130

Spray deposition of titania films with introduction of crystalline nanoparticles for solid-state dye-sensitized solar cells — •Lin Song¹, Weijia Wang¹, Volker Körstgens¹, Daniel Moseguí González¹, Yuan Yao¹, Norma K. Minar², Dina Fattakhova-Rohlfing², Stephan V. Roth³, and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching — ²LMU München, Department of Chemistry and Center for NanoScience, Butenandtstr.5-13 (E), 81377 Munich — ³Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany

Solid-state dye-sensitized solar cells (ssDSSCs), using solid-state hole transporting materials (HTM) as alternatives for dye generation and hole transport, have received immense attention because such photovoltaic devices avoid the leakage and corrosion problems in conventional DSSCs. In particular, ssDSSCs based on TiO2 and organic HTM are of great interest due to the combined advantages of both organic and inorganic components. We investigate this kind of solar cells fabricated using mesoporous titania films as electron transporting materials, a metal-free dye D149 as a light harvester, and P3HT as HTM. For optimizing the device performance, we introduce crystalline titania nanoparticles into the titania film in order to obtain a more effective titania photoanode. Moreover, spray coating is employed for the film deposition because it is simple, low cost, and usable for large-scale production. The morphology and crystallinity of titania films are investigated, showing a crucial influence on final device performance.