Ultrasensitive and Fast All-Inorganic Perovskite-Based Photodetector via Fast Carrier Diffusion

B Yang; Fengying Zhang; Junsheng Chen; Songqiu Yang; Xusheng Xia; Tõnu Pullerits; Weiqiao Deng; Keli Han

doi:10.1002/adma.201703758

Ultrasensitive and Fast All-Inorganic Perovskite-Based Photodetector via Fast Carrier Diffusion

B Yang, Fengying Zhang, Junsheng Chen, Songqiu Yang, Xusheng Xia, Tõnu Pullerits, Weiqiao Deng, Keli Han

Research output: Contribution to journal › Article › peer-review

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).

Original language	English
Pages (from-to)	1703758
Journal	Advanced Materials
Volume	29
Issue number	40
Early online date	2017 Sept 1
DOIs	https://doi.org/10.1002/adma.201703758
Publication status	Published - 2017 Oct

Subject classification (UKÄ)

Materials Chemistry
Condensed Matter Physics (including Material Physics, Nano Physics)

Free keywords

CsPbBr
Optoelectronics
Perovskites
Photoluminescence
Single crystals

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10.1002/adma.201703758

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title = "Ultrasensitive and Fast All-Inorganic Perovskite-Based Photodetector via Fast Carrier Diffusion",

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).",

keywords = "CsPbBr, Optoelectronics, Perovskites, Photoluminescence, Single crystals",

author = "B Yang and Fengying Zhang and Junsheng Chen and Songqiu Yang and Xusheng Xia and T{\~o}nu Pullerits and Weiqiao Deng and Keli Han",

year = "2017",

month = oct,

doi = "10.1002/adma.201703758",

language = "English",

volume = "29",

pages = "1703758",

journal = "Advanced Materials",

issn = "0935-9648",

publisher = "John Wiley \& Sons Inc.",

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TY - JOUR

T1 - Ultrasensitive and Fast All-Inorganic Perovskite-Based Photodetector via Fast Carrier Diffusion

AU - Yang, B

AU - Zhang, Fengying

AU - Chen, Junsheng

AU - Yang, Songqiu

AU - Xia, Xusheng

AU - Pullerits, Tõnu

AU - Deng, Weiqiao

AU - Han, Keli

PY - 2017/10

Y1 - 2017/10

N2 - 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).

AB - 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).

KW - CsPbBr

KW - Optoelectronics

KW - Perovskites

KW - Photoluminescence

KW - Single crystals

UR - https://www.scopus.com/pages/publications/85028589031

U2 - 10.1002/adma.201703758

DO - 10.1002/adma.201703758

M3 - Article

C2 - 28863245

AN - SCOPUS:85028589031

SN - 0935-9648

VL - 29

SP - 1703758

JO - Advanced Materials

JF - Advanced Materials

IS - 40

ER -

Ultrasensitive and Fast All-Inorganic Perovskite-Based Photodetector via Fast Carrier Diffusion

Abstract

Subject classification (UKÄ)

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Photophysics of Perovskite Nano- and Microcrystals

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