Low trap-state density, high carrier mobility, and efficient charge carrier collection are key parameters for photodetectors with high sensitivity and fast response time. This study demonstrates a simple solution growth method to prepare CsPbBr3 microcrystals (MCs) with low trap-state density. Time-dependent photoluminescence study with one-photon excitation (OPE) and two-photon excitation (TPE) indicates that CsPbBr3 MCs exhibit fast carrier diffusion with carrier mobility over 100 cm2 V−1 S−1. Furthermore, CsPbBr3 MC-based photodetectors with high charge carriers' collection efficiency are fabricated. Such photodetectors show ultrahigh responsivity (R) up to 6 × 104 A W−1 with OPE and high R up to 6 A W−1 with TPE. The R for OPE is over one order of magnitude higher (the R for TPE is three orders of magnitude higher) than that of previously reported all-inorganic perovskite-based photodetectors. Moreover, the photodetectors exhibit fast response time of ≈1 ms, which corresponds to a gain ≈105 and a gain- bandwidth product of 108 Hz for OPE (a gain ≈103 and a gain-bandwidth product of 106 Hz for TPE).
%0 Journal Article
%1 ADMA:ADMA201703758
%A Yang, Bin
%A Zhang, Fengying
%A Chen, Junsheng
%A Yang, Songqiu
%A Xia, Xusheng
%A Pullerits, Tõnu
%A Deng, Weiqiao
%A Han, Keli
%D 2017
%J Advanced Materials
%K carrier diffusion perovskite photodetector
%P n/a--n/a
%R 10.1002/adma.201703758
%T Ultrasensitive and Fast All-Inorganic Perovskite-Based Photodetector via Fast Carrier Diffusion
%U http://dx.doi.org/10.1002/adma.201703758
%X Low trap-state density, high carrier mobility, and efficient charge carrier collection are key parameters for photodetectors with high sensitivity and fast response time. This study demonstrates a simple solution growth method to prepare CsPbBr3 microcrystals (MCs) with low trap-state density. Time-dependent photoluminescence study with one-photon excitation (OPE) and two-photon excitation (TPE) indicates that CsPbBr3 MCs exhibit fast carrier diffusion with carrier mobility over 100 cm2 V−1 S−1. Furthermore, CsPbBr3 MC-based photodetectors with high charge carriers' collection efficiency are fabricated. Such photodetectors show ultrahigh responsivity (R) up to 6 × 104 A W−1 with OPE and high R up to 6 A W−1 with TPE. The R for OPE is over one order of magnitude higher (the R for TPE is three orders of magnitude higher) than that of previously reported all-inorganic perovskite-based photodetectors. Moreover, the photodetectors exhibit fast response time of ≈1 ms, which corresponds to a gain ≈105 and a gain- bandwidth product of 108 Hz for OPE (a gain ≈103 and a gain-bandwidth product of 106 Hz for TPE).
@article{ADMA:ADMA201703758,
abstract = {Low trap-state density, high carrier mobility, and efficient charge carrier collection are key parameters for photodetectors with high sensitivity and fast response time. This study demonstrates a simple solution growth method to prepare CsPbBr3 microcrystals (MCs) with low trap-state density. Time-dependent photoluminescence study with one-photon excitation (OPE) and two-photon excitation (TPE) indicates that CsPbBr3 MCs exhibit fast carrier diffusion with carrier mobility over 100 cm2 V−1 S−1. Furthermore, CsPbBr3 MC-based photodetectors with high charge carriers' collection efficiency are fabricated. Such photodetectors show ultrahigh responsivity (R) up to 6 × 104 A W−1 with OPE and high R up to 6 A W−1 with TPE. The R for OPE is over one order of magnitude higher (the R for TPE is three orders of magnitude higher) than that of previously reported all-inorganic perovskite-based photodetectors. Moreover, the photodetectors exhibit fast response time of ≈1 ms, which corresponds to a gain ≈105 and a gain- bandwidth product of 108 Hz for OPE (a gain ≈103 and a gain-bandwidth product of 106 Hz for TPE).},
added-at = {2017-09-18T14:50:31.000+0200},
author = {Yang, Bin and Zhang, Fengying and Chen, Junsheng and Yang, Songqiu and Xia, Xusheng and Pullerits, Tõnu and Deng, Weiqiao and Han, Keli},
biburl = {https://www.bibsonomy.org/bibtex/26a27b79186fbe71b42ae96106400a5eb/fabianopkm},
doi = {10.1002/adma.201703758},
interhash = {889f8be461a5f75910a6164c4447cfd0},
intrahash = {6a27b79186fbe71b42ae96106400a5eb},
issn = {1521-4095},
journal = {Advanced Materials},
keywords = {carrier diffusion perovskite photodetector},
pages = {n/a--n/a},
timestamp = {2017-09-18T14:50:31.000+0200},
title = {Ultrasensitive and Fast All-Inorganic Perovskite-Based Photodetector via Fast Carrier Diffusion},
url = {http://dx.doi.org/10.1002/adma.201703758},
year = 2017
}