Modulation principle of the CPDs in perovskite-based photodetectors. (IMAGE)
Caption
a, Via controlling the carbonized temperature, the length of polymer chains can be regulated. The CPDs show strong viscoelasticity as illustrated. b, The DFT calculation results shows a coordinate effect between the carboxyl acid functional group and the unbonded Pb atom, where the electrons transfer from the Pb atom into the O atom. c, The photograph of the homemade bending system and the schematic of the fabricated photodetectors. The CPDs modulated photodetectors show great flexibility and stability, whose photo-response shows no loss after bending 10000 times. d, Through regulating various CPDs introduced with different kinds and amounts of functional groups, the photodetector devices exhibit different I-V properties, where the CPDs lower their dark current. The champion of these devices achieves a resolution of weak light with an intensity of 10.1 pw/cm², reaching an intensity of 1/50 compared to the devices without modulation.
Credit
by Mingrui Tan, Mingbian Li, Wanting Pan, Xiaopeng Feng, Yuhong He, Junjun Liu, Fengxia Dong, Haotong Wei, and Bai Yang
Usage Restrictions
Credit must be given to the creator.
License
CC BY