In-situ fabricated and plasmonic enhanced MACsPbBr3-polymer composite perovskite film based UV photodetector
Abida Perveen, Artur Movsesyan, Syed Muhammad Abubakar, Fawad Saeed, Sajid Hussain, Ahmad Raza, Yubing Xu, Alagesan Subramanian, Qasim Khan, Wei Lei
Abstract
Organic-inorganic hybrid perovskite is being extensively applied to optoelectronics. However, the complex fabrication techniques, long-term instability, inefficient charge transportation; poor surface coverage hinders the expansion of its applications. Herein, we report for the first time the in-situ synthesis of MACsPbBr 3 -perovskite crystals in polymer-matrix to act as a light absorber for efficient ultraviolet light detection. The devices fabricated with the MACsPbBr 3 -perovskite films showed a maximum photocurrent of 8.9 × 10 −6 , a dark current of 1.7 × 10 −11 A, responsivity of 45.75 AW −1 , detectivity of 1.05 × 10 13 Jones and on/off ratio >10 5 at 0 V, under the illumination of 0.28 mW cm −2 . The plasmonic enhancement was explored by fabricating PDs on (gold nanoparticles) AuNPs/ZnO structure, which exhibited photocurrent enhancement (10 −5 ), ascribed to the huge localized electric field induced by the surface plasmon resonance, scattering, and reflectance from AuNPs and structured ZnO surface, and improved the responsivity (55.91 AW −1 ) and on/off ration (>10 6 ) by 1.12-fold and 10-fold. And the formed Schottky barrier between Pero and AuNPs/ZnO region could lead to the reduced dark current (10 −13 A) and improved detectivity (7.91 × 10 14 Jones). This study offers a different pathway for the designing of high-performance plasmonic PDs.