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 - Funding Information:
We acknowledge the General Research Fund (CityU 11275961) and the Theme-based Research Scheme (T42-103/16-N) of the Research Grants Council of Hong Kong SAR, China, the National Natural Science Foundation of China (grants 51672229 and 61605024), the Science Technology and Innovation Committee of Shenzhen Municipality (grant JCYJ 20170818095520778), and a grant from the Shenzhen Research Institute, City University of Hong Kong.
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.
UR - http://www.scopus.com/inward/record.url?scp=85047058489&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047058489&partnerID=8YFLogxK
U2 - 10.1021/acsami.8b03517
DO - 10.1021/acsami.8b03517
M3 - Article
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 -