Dopant‐Free Hole‐Transporting Materials for Stable and Efficient Perovskite Solar Cells. Issue 35 (17th July 2017)

• Record Type: Journal Article
• Authors: Paek, Sanghyun; Qin, Peng; Lee, Yonghui; Cho, Kyung Taek; Gao, Peng; Grancini, Giulia; Oveisi, Emad; Gratia, Paul; Rakstys, Kasparas; Al‐Muhtaseb, Shaheen A.; Ludwig, Christian; Ko, Jaejung; Nazeeruddin, Mohammad Khaja
• Is Part Of: Advanced materials. Volume 29:Issue 35(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-07-17
• Subjects: dopant‐free -- hole‐transport materials -- perovskite solar cells -- photovoltaic -- stability; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201606555
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : Molecularly engineered novel dopant‐free hole‐transporting materials for perovskite solar cells (PSCs) combined with mixed‐perovskite (FAPbI3 )0.85 (MAPbBr3 )0.15 (MA: CH3 NH3 +, 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 cm 2 V −1 s −1 and 1.1 × 10 −4 cm 2 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. Abstract : 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.