Advanced Materials
Advanced Materials
5 years ago

Dopant-Free Hole-Transporting Materials for Stable and Efficient Perovskite Solar Cells

Dopant-Free Hole-Transporting Materials for Stable and Efficient Perovskite Solar Cells
Peng Qin, Yonghui Lee, Giulia Grancini, Sanghyun Paek, Emad Oveisi, Mohammad Khaja Nazeeruddin, Christian Ludwig, Paul Gratia, Peng Gao, Shaheen A. Al-Muhtaseb, Kyung Taek Cho, Kasparas Rakstys, Jaejung Ko
Molecularly engineered novel dopant-free hole-transporting materials for perovskite solar cells (PSCs) combined with mixed-perovskite (FAPbI3)0.85(MAPbBr3)0.15 (MA: CH3NH3+, FA: NH=CHNH3+) that exhibit an excellent power conversion efficiency of 18.9% under AM 1.5 conditions are investigated. The mobilities of FA-CN, and TPA-CN are determined to be 1.2 × 10−4 cm2 V−1 s−1 and 1.1 × 10−4 cm2 V−1 s−1, respectively. Exceptional stability up to 500 h is measured with the PSC based on FA-CN. Additionally, it is found that the maximum power output collected after 1300 h remained 65% of its initial value. This opens up new avenue for efficient and stable PSCs exploring new materials as alternatives to Spiro-OMeTAD. Novel dopant-free hole-transporting materials for perovskite solar cells (PSCs), which exhibit an excellent power conversion efficiency of 18.9% under AM 1.5 conditions are investigated. The PSC based on FA-CN shows exceptional stability up to 500 h. The PCE collected during 1300 h is observed to remain at 65% of its initial value. This opens an avenue for efficient and stable PSCs exploring new materials.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adma.201606555

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