title: Broadband Phototransistor Based on CH3NH3PbI3Perovskite and PbSe Quantum Dot Heterojunction.
abstract: Organic lead halide perovskites have received a huge amount of interest since emergence, because of tremendous potential applications in optoelectronic devices. Here field effect phototransistors (FEpTs) based on CH3NH3PbI3perovskite/PbSe colloidal quantum dot heterostructure are demonstrated. The high light absorption and optoelectric conversion efficiency, due to the combination of perovskite and quantum dots, maintain the responsivities in a high level, especially at 460 nm up to 1.2 A/W. The phototransistor exhibits bipolar behaviors, and the carrier mobilities are determined to be 0.147 cm2V-1s-1for holes and 0.16 cm2V-1s-1for electrons. The device has a wide spectral response spectrum ranging from 300 to 1500 nm. A short photoresponse time is less than 3 ms due to the assistance of heterojunction on the transfer of photoexcitons. The excellent performances presented in the device especially emphasize the CH3NH3PbI3perovskite-PbSe quantum dot as a promising material for future photoelectronic applications.
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Yu
authors.identifier: http://orcid.org/0000-0001-6712-6191
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Yating
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Haiting
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Xiaoxian
authors.initials: X
authors.lastname: Song
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Mingxuan
authors.initials: M
authors.lastname: Cao
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Yongli
authors.initials: Y
authors.lastname: Che
authors.affiliation: Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science, Tianjin University Tianjin, 300072, China.
authors.forename: Haitao
authors.initials: H
authors.lastname: Dai
authors.affiliation: Center of Material Science, National University of Defense Technology Changsha 410073, China.
authors.forename: Junbo
authors.initials: J
authors.lastname: Yang
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Jianlong
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Heng
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University , Tianjin 300072, China.
authors.forename: Jianquan
authors.initials: J
authors.lastname: Yao