TY - JOUR
T1 - Realizing High-Detectivity Near-Infrared Photodetectors in Tin-Lead Perovskites by Double-Sided Surface-Preferred Distribution of Multifunctional Tin Thiocyanate Additive
AU - Liu, Hui
AU - Zhu, Lu
AU - Zhang, Hong
AU - He, Xinjun
AU - Yan, Feng
AU - Wong, Kam Sing
AU - Choy, Wallace C.H.
N1 - Funding Information:
This research was supported by seed funds (Grant Nos. 202011159254 and 202111159113) from the University Grant Council of the University of Hong Kong, the General Research Fund (Grant Nos. 17200518, 17201819, 17211220, and 17200021), and the Collaborative Research Fund (Grant Nos. C7035-20G and C5037-18G) from Research Grant Committee and grant MRP/040/21X from Innovation and Technology Commission, Hong Kong Special Administrative Region, China. L. Zhu acknowledges the financial support from the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021A1515012198), the Science and Technology Program of Guangzhou (Grant No. 202102021084), and the Fundamental Research Funds for the Central Universities, Sun Yat-sen University (Grant No. 22qntd1501). We thank Y. Tao and X. Lu from Department of Physics of The Chinese University of Hong Kong for their help with GIWAXS characterization. We thank G. Zhou and N. Zhao from Department of Electronic Engineering of The Chinese University of Hong Kong for providing the commercial FDS1010 Si photodiode.
Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/12/19
Y1 - 2022/12/19
N2 - Tin-lead perovskite photodetectors are attractive alternatives to silicon counterparts for near-infrared photodetection, due to their outstanding optoelectronic properties, solution processability, and flexible compatibility. However, uncontrollable crystallization and easy oxidation problems of tin-containing perovskites severely hinder advances in their perfomance. Herein, we develop a high-detectivity near-infrared photodetector using a tailored tin-lead perovskite structure. Notably, we employ tin thiocyanate to form a double-sided surface-preferred distribution in tin-lead perovskites, in which the majority is located at bottom and top surfaces, and the tiny minority positioned inside the films. The tailored perovskite structure with the unique additive distribution significantly improves the film morphology and antioxidation ability. Finally, self-powered tin-lead perovskite photodetectors achieve a peak responsivity of 0.57 A W-1, a detectivity of 8.48 × 1012 Jones at 910 nm, and a large linear dynamic range of 213 dB, accompanied by an outstanding lifetime of 2300 h. This work opens up a new avenue to developing high-performance near-infrared photodetectors.
AB - Tin-lead perovskite photodetectors are attractive alternatives to silicon counterparts for near-infrared photodetection, due to their outstanding optoelectronic properties, solution processability, and flexible compatibility. However, uncontrollable crystallization and easy oxidation problems of tin-containing perovskites severely hinder advances in their perfomance. Herein, we develop a high-detectivity near-infrared photodetector using a tailored tin-lead perovskite structure. Notably, we employ tin thiocyanate to form a double-sided surface-preferred distribution in tin-lead perovskites, in which the majority is located at bottom and top surfaces, and the tiny minority positioned inside the films. The tailored perovskite structure with the unique additive distribution significantly improves the film morphology and antioxidation ability. Finally, self-powered tin-lead perovskite photodetectors achieve a peak responsivity of 0.57 A W-1, a detectivity of 8.48 × 1012 Jones at 910 nm, and a large linear dynamic range of 213 dB, accompanied by an outstanding lifetime of 2300 h. This work opens up a new avenue to developing high-performance near-infrared photodetectors.
UR - http://www.scopus.com/inward/record.url?scp=85144538814&partnerID=8YFLogxK
U2 - 10.1021/acsenergylett.2c02055
DO - 10.1021/acsenergylett.2c02055
M3 - Journal article
AN - SCOPUS:85144538814
SN - 2380-8195
VL - 8
SP - 577
EP - 589
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 1
ER -
