X-ray-ultraviolet–visible-near-infrared photoresponsesrealized in a lead-free hybrid perovskite ferroelectricthrough light-induced ferro-pyro-phototronic effect  

作　　者：Dongying Fu Yanli Ma Shufang Wu Lin Pan Qi Wang Ruifang Zhao Xian-Ming Zhang Junhua Luo 

机构地区：[1]Institute of Crystalline Materials,Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University,Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province,Taiyuan,Shanxi,the People's Republic of China [2]College of Chemistry,Key Laboratory of Interface Science and Engineering in Advanced Material,Ministry of Education,Taiyuan University of Technology,Taiyuan,Shanxi,the People's Republic of China [3]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou,Fujian,the People's Republic of China

出　　处：《InfoMat》2024年第10期96-107,共12页信息材料（英文）

基　　金：National Natural Science Foundation ofChina, Grant/Award Numbers: 22005183,22275117;the Programof State KeyLaboratory of Quantum Optics andQuantum Optics Devices, Grant/AwardNumber: KF202204。

摘　　要：Due to the built-in electric field induced by spontaneous polarization in hybridperovskite (HP) ferroelectrics, the devices based on them exhibit excellent performancein self-powered photodetection. However, most of the self-poweredphotodetector are made of lead-based HP ferroelectrics and have a relativelynarrow photoresponse waveband. Although lead-free HPs solve the problem oflead toxicity, their optoelectronic performance is inferior to that of lead-basedHPs and photoresponse waveband is limited by its optical band gap, whichhinders their further application. To solve this problem, herein, a lead-free HPferroelectric (HDA)BiI5 (HDA is hexane-1,6-diammonium) with large spontaneouspolarization shows an enhanced photocurrent and achieves x-ray-ultraviolet–visible-near-infrared (x-ray-UV–Vis–NIR) photoresponse through theferro-pyro-phototronic (FPP) effect. The ferroelectric, pyroelectric, and photovoltaiccharacteristics coupled together in a single-phase (HDA)BiI5 ferroelectricis an effective way to improve the performance of the devices. What isparticularly attractive is that the FPP effect not only improves the optoelectronicperformance of (HDA)BiI_(5), but also achieves broadband photoresponsesbeyond its optical absorption range. Especially, the current boosting with anexceptional contrast of 1100% and 2400% under 520 and 637 nm, respectively,which is associated with FPP effect. Meanwhile, single crystal self-poweredphotodetector based on (HDA)BiI5 also exhibit significant FPP effects evenunder high-energy x-ray, which owns an outstanding sensitivity of 170.7 μCGy^(-1) cm^(-2) and a lower detection limit of 266 nGy s^(-1) at 0 V bias. Therefore, it is of great significance to study the coupling of multiple physical effects andimprove device performance based on lead-free HP ferroelectrics.

关 键 词：broadband photoresponse ferro-pyro-phototronic effect hybrid perovskite lead-free ferroelectric self-powered photodetection 

分 类 号：TN21[电子电信—物理电子学]