Bandgap Engineering of Lead-Halide Perovskite-Type Ferroelectrics

• Published in: Advanced materials (Weinheim) Vol. 28; no. 13; pp. 2579 - 2586
• Main Authors: Ye, Heng-Yun, Liao, Wei-Qiang, Hu, Chun-Li, Zhang, Yi, You, Yu-Meng, Mao, Jiang-Gao, Li, Peng-Fei, Xiong, Ren-Gen
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 01.04.2016; Wiley Subscription Services, Inc
• Subjects: Adjustment; bandgap engineering; Energy gaps (solid state); Ferroelectric materials; Ferroelectricity; Materials science; metal halide perovskites; Perovskites; phase transitions; Photovoltaic cells; semiconductivity; Solar cells; phase transitions; bandgap engineering; metal halide perovskites; semiconductivity; ferroelectricity

Semiconducting ferroelectricity is realized in hybrid perovskite‐type compounds (cyclohexylammonium)2PbBr4−4xI4x (x = 0–1). By adjusting the composition x, the bandgap is successfully tuned from previously reported 3.65 eV to as low as 2.74 eV, and the excellent ferroelectricity was kept intact. Thi...