Dopant compensation in alloyed CH3NH3PbBr3-x Clx perovskite single crystals for gamma-ray spectroscopy

Haotong Wei; Dylan Desantis; Wei Wei; Yehao Deng; Dengyang Guo; Tom J. Savenije; Lei Cao; Jinsong Huang

doi:10.1038/nmat4927

Dopant compensation in alloyed CH₃NH₃PbBr_3-x Cl_x perovskite single crystals for gamma-ray spectroscopy

Haotong Wei, Dylan Desantis, Wei Wei, Yehao Deng, Dengyang Guo, Tom J. Savenije, Lei Cao, Jinsong Huang^*

^*Corresponding author for this work

ChemE/Opto-electronic Materials

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

452 Citations (Scopus)

Abstract

Organic-inorganic halide perovskites (OIHPs) bring an unprecedented opportunity for radiation detection with their defecttolerance nature, large mobility-lifetime product, and simple crystal growth from solution. Here we report a dopant compensation in alloyed OIHP single crystals to overcome limitations of device noise and charge collection, enabling -ray spectrum collection at room temperature. CH₃NH₃PbBr₃ and CH₃NH₃PbCl₃ are found to be p-type and n-type doped, respectively, whereas dopant-compensated CH₃NH₃PbBr_2.94Cl_0.06 alloy has over tenfold improved bulk resistivity of 3.6×10⁹ φcm. Alloying also increases the hole mobility to 560 cm² V^-1 s^-1, yielding a high mobility-lifetime product of 1.8×10^-2 cm² V^-1. The use of a guard ring electrode in the detector reduces the crystal surface leakage current and device dark current. A distinguishable ¹³⁷Cs energy spectrum with comparable or better resolution than standard scintillator detectors is collected under a small electric field of 1.8Vmm^-1 at room temperature.

Original language	English
Pages (from-to)	826-833
Number of pages	8
Journal	Nature Materials
Volume	16
Issue number	8
DOIs	https://doi.org/10.1038/nmat4927
Publication status	Published - 1 Aug 2017

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title = "Dopant compensation in alloyed CH3NH3PbBr3-x Clx perovskite single crystals for gamma-ray spectroscopy",

abstract = "Organic-inorganic halide perovskites (OIHPs) bring an unprecedented opportunity for radiation detection with their defecttolerance nature, large mobility-lifetime product, and simple crystal growth from solution. Here we report a dopant compensation in alloyed OIHP single crystals to overcome limitations of device noise and charge collection, enabling -ray spectrum collection at room temperature. CH3NH3PbBr3 and CH3NH3PbCl3 are found to be p-type and n-type doped, respectively, whereas dopant-compensated CH3NH3PbBr2.94Cl0.06 alloy has over tenfold improved bulk resistivity of 3.6×109 φcm. Alloying also increases the hole mobility to 560 cm2 V-1 s-1, yielding a high mobility-lifetime product of 1.8×10-2 cm2 V-1. The use of a guard ring electrode in the detector reduces the crystal surface leakage current and device dark current. A distinguishable 137Cs energy spectrum with comparable or better resolution than standard scintillator detectors is collected under a small electric field of 1.8Vmm-1 at room temperature.",

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T1 - Dopant compensation in alloyed CH3NH3PbBr3-x Clx perovskite single crystals for gamma-ray spectroscopy

AU - Wei, Haotong

AU - Desantis, Dylan

AU - Wei, Wei

AU - Deng, Yehao

AU - Guo, Dengyang

AU - Savenije, Tom J.

AU - Cao, Lei

AU - Huang, Jinsong

PY - 2017/8/1

Y1 - 2017/8/1

N2 - Organic-inorganic halide perovskites (OIHPs) bring an unprecedented opportunity for radiation detection with their defecttolerance nature, large mobility-lifetime product, and simple crystal growth from solution. Here we report a dopant compensation in alloyed OIHP single crystals to overcome limitations of device noise and charge collection, enabling -ray spectrum collection at room temperature. CH3NH3PbBr3 and CH3NH3PbCl3 are found to be p-type and n-type doped, respectively, whereas dopant-compensated CH3NH3PbBr2.94Cl0.06 alloy has over tenfold improved bulk resistivity of 3.6×109 φcm. Alloying also increases the hole mobility to 560 cm2 V-1 s-1, yielding a high mobility-lifetime product of 1.8×10-2 cm2 V-1. The use of a guard ring electrode in the detector reduces the crystal surface leakage current and device dark current. A distinguishable 137Cs energy spectrum with comparable or better resolution than standard scintillator detectors is collected under a small electric field of 1.8Vmm-1 at room temperature.

AB - Organic-inorganic halide perovskites (OIHPs) bring an unprecedented opportunity for radiation detection with their defecttolerance nature, large mobility-lifetime product, and simple crystal growth from solution. Here we report a dopant compensation in alloyed OIHP single crystals to overcome limitations of device noise and charge collection, enabling -ray spectrum collection at room temperature. CH3NH3PbBr3 and CH3NH3PbCl3 are found to be p-type and n-type doped, respectively, whereas dopant-compensated CH3NH3PbBr2.94Cl0.06 alloy has over tenfold improved bulk resistivity of 3.6×109 φcm. Alloying also increases the hole mobility to 560 cm2 V-1 s-1, yielding a high mobility-lifetime product of 1.8×10-2 cm2 V-1. The use of a guard ring electrode in the detector reduces the crystal surface leakage current and device dark current. A distinguishable 137Cs energy spectrum with comparable or better resolution than standard scintillator detectors is collected under a small electric field of 1.8Vmm-1 at room temperature.

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Dopant compensation in alloyed CH₃NH₃PbBr_3-x Cl_x perovskite single crystals for gamma-ray spectroscopy

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