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HL: Fachverband Halbleiterphysik
HL 45: Hybrid Perovskite and Photovoltaics I (joint session CPP/HL)
HL 45.11: Vortrag
Mittwoch, 18. März 2020, 12:15–12:30, ZEU 260
Perovskite solar cells from direct co-evaporation: Impact of hole transport materials on device performance — •Marcel Roß1, Amran Al-Ashouri1, Erica Magliano1, Marko Jošt1, and Steve Albrecht1,2 — 1Helmholtz-Zentrum Berlin, D-12489 — 2Technical University Berlin, D-10587
Deposition of perovskite solar cell absorbers by co-evaporation offers a variety of advantages over solution based preparation such as homogeneous coating of large substrates and conformal coverage of different textures. Nevertheless, the majority of reported publications focusses on solution-based preparation of perovskite solar cells. This is likely due to the challenging evaporation characteristic of organic precursors and the limited understanding of the perovskite co-evaporation process itself. To achieve a better process control, we implement an evaporation setup with a thermal management system. This enables the deposition of high quality Methylammonium Lead Iodide perovskite films as confirmed by XRD, PL and optical measurements. To analyse the influence of substrate properties on film formation, perovskites are deposited on different hole transport materials (HTMs) such as PTAA and self-assembling monolayer (SAM) molecules. Furthermore, the impact of the substrate temperature during deposition of the perovskite is investigated. While the substrate temperature is mainly influencing the incorporation of methylammonium iodide into the film, the p-i-n solar cell performance is strongly affected by the used HTM. Finally, a stabilized efficiency over 20% is realized with the SAM hole transport layer and a proper substrate temperature.