TY - JOUR
T1 - Energy Band Engineering Drives Efficient and Stable Self-Powered Ultraviolet Photodetectors
AU - Zhang, Linyun
AU - Yao, Zexin
AU - Qiu, Xiaoqing
AU - Li, Jiancheng
AU - Hu, Zhongqiang
AU - Zhou, Hai
N1 - Publisher Copyright:
© 1980-2012 IEEE.
PY - 2026
Y1 - 2026
N2 - Halide perovskites have attracted tremendous attention in optoelectronic devices due to their excellent photophysical properties. However, they are prone to photodegradation under ultraviolet (UV) light, limiting their applications in UV photodetectors (PDs). Here, energy band engineering is adopted to achieve efficient and stable perovskite UVPDs, in which the band gap of the CsPbCl3 microcrystals (MCs) is regulated by Rb doping. The fabricated Cs0.84Rb0.16PbCl3 MC film exhibits wider bandgap and improved optical properties. Finally, under 365 nm light, the Cs0.84Rb0.16PbCl3 perovskite PDs show superior UV detection performance including an open-circuit voltage of 0.84 V, an on-off ratio of 2.81×106, a responsivity of 0.6 A/W and a detectivity of 3.48×1012 Jones. Moreover, the PDs exhibit outstanding stability to UV light and temperature. This work provides a new strategy for the fabrication of high-performance perovskite UVPDs.
AB - Halide perovskites have attracted tremendous attention in optoelectronic devices due to their excellent photophysical properties. However, they are prone to photodegradation under ultraviolet (UV) light, limiting their applications in UV photodetectors (PDs). Here, energy band engineering is adopted to achieve efficient and stable perovskite UVPDs, in which the band gap of the CsPbCl3 microcrystals (MCs) is regulated by Rb doping. The fabricated Cs0.84Rb0.16PbCl3 MC film exhibits wider bandgap and improved optical properties. Finally, under 365 nm light, the Cs0.84Rb0.16PbCl3 perovskite PDs show superior UV detection performance including an open-circuit voltage of 0.84 V, an on-off ratio of 2.81×106, a responsivity of 0.6 A/W and a detectivity of 3.48×1012 Jones. Moreover, the PDs exhibit outstanding stability to UV light and temperature. This work provides a new strategy for the fabrication of high-performance perovskite UVPDs.
KW - Energy Band Engineering
KW - environmental stability
KW - Halide perovskite
KW - microcrystal
KW - self-powered
UR - https://www.scopus.com/pages/publications/105039263613
U2 - 10.1109/LED.2026.3692808
DO - 10.1109/LED.2026.3692808
M3 - 文章
AN - SCOPUS:105039263613
SN - 0741-3106
JO - IEEE Electron Device Letters
JF - IEEE Electron Device Letters
ER -