Effect of Amphiphilic Quaternary Ammonium Salt Additive on Performance and Stability of Perovskite Solar Cells

doi:10.7503/cjcu20190024

Abstract

Abstract: Amphiphilic hexadecyl trimethyl ammonium bromide(CTMAB) as additive was introduced into a CH₃NH₃PbI₃ pervoskite precursor to adjust the morphology and crystallinity of perovskite layers during the film formation process. SEM and AFM images showed that the perovskite films with CTMAB present more uniform and better coverage compared with perovskite film without CTMAB. As a result, perovskite films with CTMAB exhibit favorable morphology and improved crystallinity and power conversion efficiency(PCE). The perfor-mance of CH₃NH₃PbI₃ based on perovskite solar cell with optimized CTMAB content achieved a summit PCE of 18.03% with photovoltage(V_oc) of 1.055 V, short circuit current density(J_sc) of 22.37 mA/cm², and fill factor(FF) of 76.37% under standard AM 1.5 solar light of 100 mW/cm² intensites. More importantly, the perovskite device with CTMAB into perovskite layer showed good stability under humidity environment during 40 d.

Key words: Hexadecyl trimethyl ammonium bromide(CTMAB), Perovskite solar cell, Photoelectric performance, Stability

CLC Number:

O646

TrendMD:

JIANG Yefang, DONG Ru, CAI Xuediao, FENG Jiangshan, LIU Zhike, LIU Shengzhong. Effect of Amphiphilic Quaternary Ammonium Salt Additive on Performance and Stability of Perovskite Solar Cells[J]. Chem. J. Chinese Universities, 2019, 40(8): 1697.

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