SKM 2023 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 39: Organic Electronics and Photovoltaics III (joint session CPP/HL)
HL 39.7: Vortrag
Donnerstag, 30. März 2023, 11:00–11:15, GÖR 226
Reduced defect density in crystalline halide perovskite films via methylamine treatment for the application in photodetectors — •Emilia Rosa Schütz1, Azhar Fakharuddin1, Yenal Yalcinkaya2,3, Efrain Ochoa-Martinez4, Shanti Bijani5, Abd. Rashid bin Mohd Yusoff6, Maria Vasilopoulou7, Tobias Seewald1, Ullrich Steiner4, Stefan Weber2,3, and Lukas Schmidt-Mende1 — 1University of Konstanz, Konstanz, Germany — 2Max Planck Institute for Polymer Research, Mainz, Germany — 3Johannes Gutenberg University Mainz, Mainz, Germany — 4Adolphe Merkle Institute, University of Fribourg, Fribourg, Switzerland — 5Unidad de Nanotecnología, Centro de Supercomputador y Bioinnovación SCBI, Universidad de Málaga, Málaga, Spain — 6Pohang University of Science and Technology, Pohang, Republic of Korea — 7National Center for Scientific Research Demokritos, Attica, Greece
The quality of a perovskite layer strongly depends on the processing conditions. Consequently, the fabrication process is often complex, and reproducibility is a challenge. Our methylamine gas-based method is able to recrystallize perovskite layers of any given quality in a controlled way, leading to millimeter-sized domains. Crystallinity significantly increases upon methylamine treatment, and crystal growth follows a preferred orientation. Photoluminescence- and space-charge limited current measurements imply that the trap density decreases after recrystallization. When applied in photodetectors, the improved film quality of the recrystallized films leads to increased detectivities and shorter response times.