TY - JOUR
T1 - Novel Series of Quasi-2D Ruddlesden-Popper Perovskites Based on Short-Chained Spacer Cation for Enhanced Photodetection
AU - Dong, Ruoting
AU - Lan, Changyong
AU - Xu, Xiuwen
AU - Liang, Xiaoguang
AU - Hu, Xiaoying
AU - Li, Dapan
AU - Zhou, Ziyao
AU - Shu, Lei
AU - Yip, Senpo
AU - Li, Chun
AU - Tsang, Sai Wing
AU - Ho, Johnny C.
N1 - Publisher Copyright:
© Copyright 2018 American Chemical Society.
PY - 2018/6/6
Y1 - 2018/6/6
N2 - Quasi two-dimensional (2D) layered organic-inorganic perovskite materials (e.g., (BA)2(MA)n-1PbnI3n+1; BA = butylamine; MA = methylamine) have recently attracted wide attention because of their superior moisture stability as compared with three-dimensional counterparts. Inevitably, hydrophobic yet insulating long-chained organic cations improve the stability at the cost of hindering charge transport, leading to the unsatisfied performance of subsequently fabricated devices. Here, we reported the synthesis of quasi-2D (iBA)2(MA)n-1PbnI3n+1 perovskites, where the relatively pure-phase (iBA)2PbI4 and (iBA)2MA3Pb4I13 films can be obtained. Because of the shorter-branched chain of iBA as compared with that of its linear equivalent (n-butylamine, BA), the resulting (iBA)2(MA)n-1PbnI3n+1 perovskites exhibit much enhanced photodetection properties without sacrificing their excellent stability. Through hot-casting, the optimized (iBA)2(MA)n-1PbnI3n+1 perovskite films with n = 4 give the significantly improved crystallinity, demonstrating the high responsivity of 117.09 mA/W, large on-off ratio of 4.0 × 102, and fast response speed (rise and decay time of 16 and 15 ms, respectively). These figure-of-merits are comparable or even better than those of state-of-the-art quasi-2D perovskite-based photodetectors reported to date. Our work not only paves a practical way for future perovskite photodetector fabrication via modulation of their intrinsic material properties but also provides a direction for further performance enhancement of other perovskite optoelectronics.
AB - Quasi two-dimensional (2D) layered organic-inorganic perovskite materials (e.g., (BA)2(MA)n-1PbnI3n+1; BA = butylamine; MA = methylamine) have recently attracted wide attention because of their superior moisture stability as compared with three-dimensional counterparts. Inevitably, hydrophobic yet insulating long-chained organic cations improve the stability at the cost of hindering charge transport, leading to the unsatisfied performance of subsequently fabricated devices. Here, we reported the synthesis of quasi-2D (iBA)2(MA)n-1PbnI3n+1 perovskites, where the relatively pure-phase (iBA)2PbI4 and (iBA)2MA3Pb4I13 films can be obtained. Because of the shorter-branched chain of iBA as compared with that of its linear equivalent (n-butylamine, BA), the resulting (iBA)2(MA)n-1PbnI3n+1 perovskites exhibit much enhanced photodetection properties without sacrificing their excellent stability. Through hot-casting, the optimized (iBA)2(MA)n-1PbnI3n+1 perovskite films with n = 4 give the significantly improved crystallinity, demonstrating the high responsivity of 117.09 mA/W, large on-off ratio of 4.0 × 102, and fast response speed (rise and decay time of 16 and 15 ms, respectively). These figure-of-merits are comparable or even better than those of state-of-the-art quasi-2D perovskite-based photodetectors reported to date. Our work not only paves a practical way for future perovskite photodetector fabrication via modulation of their intrinsic material properties but also provides a direction for further performance enhancement of other perovskite optoelectronics.
KW - hot-cast
KW - photodetection
KW - quasi-2D
KW - Ruddlesden-Popper perovskite
KW - short-chained spacer
KW - thin film
UR - https://www.scopus.com/pages/publications/85047058489
U2 - 10.1021/acsami.8b03517
DO - 10.1021/acsami.8b03517
M3 - 文章
C2 - 29741083
AN - SCOPUS:85047058489
SN - 1944-8244
VL - 10
SP - 19019
EP - 19026
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 22
ER -