Regensburg 2016 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 19: Hybrid and Perovskite Photovoltaics I (Joint session of CPP, DS and HL, organized by CPP)
HL 19.3: Talk
Monday, March 7, 2016, 15:30–15:45, H38
The influence of hole transporting materials on the charge transport in stacked perovskite-based systems — •Kathrin Bader1,2, Michiel Petrus1,2, Thomas Bein1,2, Pablo Docampo1,2, Matthias Handloser1,2, and Achim Hartschuh1,2 — 1Department of Chemistry and CeNS, LMU Munich — 2Nanosystems Initiative Munich (NIM)
Hybrid metal halide perovskites have become a focal point of the photovoltaic community as promising candidates for next-generation solar cells. Extremely fast progress in this field has taken efficiencies to over 20 % [1] and lead to the development of a large variety of material compositions, preparation techniques and device structures [2]. Although the fabrication of the perovskite absorber itself is comparably cheap, latest device architectures incorporate the expensive hole transporting material (HTM) spiro-OMeTAD. To reduce the overall production costs for perovskite-based devices alternative organic HTMs have been developed [3]. Here we use a contact-less technique based on time-resolved laser scanning confocal microscopy [4] to visualize the influence of different HTMs on CH3NH3PbI3 thin films. We investigate charge carrier transport properties and photoluminescence lifetimes of individual HTM layers as well as stacked perovskite/HTM systems and identify potential candidates to replace the expensive spiro-OMeTAD in the device structure. [1] Green, M. A. et al., Prog. Photovolt: Res. Appl. 2015, 23, 805-812. [2] Green, M. A. et al., Nature Photon. 2014, 8, 506-514. [3] Petrus, M. L. et al., J. Mater. Chem. A 2015, 3, 12159-12162. [4] Bader, K. et al., ACS Photonics 2015, under review.