High spectral resolution of gamma-rays at room temperature by perovskite CsPbBr3 single crystals

被引：453

作者：

He, Yihui ^{[1
]}

Matei, Liviu ^{[2
]}

Jung, Hee Joon ^{[3
]}

McCall, Kyle M. ^{[1
,3
]}

Chen, Michelle ^{[1
]}

Stoumpos, Constantinos C. ^{[1
]}

Liu, Zhifu ^{[3
]}

Peters, John A. ^{[3
,4
]}

Chung, Duck Young ^{[5
]}

Wessels, Bruce W. ^{[3
]}

Wasielewski, Michael R. ^{[1
]}

Dravid, Vinayak P. ^{[3
]}

Burger, Arnold ^{[2
]}

Kanatzidis, Mercouri G. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA

[2] Fisk Univ, Dept Life & Phys Sci, Nashville, TN 37208 USA

[3] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[4] Chicago State Univ, Dept Chem & Phys, Chicago, IL 60628 USA

[5] Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

基金：

美国国家科学基金会;

关键词：

TRAVELING HEATER METHOD; RADIATION DETECTORS; 3-DIMENSIONAL POSITION; HALIDE PEROVSKITES; CDZNTE DETECTORS; CDTE; GROWTH;

D O I：

10.1038/s41467-018-04073-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Gamma-ray detection and spectroscopy is the quantitative determination of their energy spectra, and is of critical value and critically important in diverse technological and scientific fields. Here we report an improved melt growth method for cesium lead bromide and a special detector design with asymmetrical metal electrode configuration that leads to a high performance at room temperature. As-grown centimeter-sized crystals possess extremely low impurity levels (below 10 p.p.m. for total 69 elements) and detectors achieve 3.9% energy resolution for 122 keV Co-57 gamma-ray and 3.8% for 662 keV Cs-137 gamma-ray. Cesium lead bromide is unique among all gamma-ray detection materials in that its hole transport properties are responsible for the high performance. The superior mobility-lifetime product for holes (1.34 x 10(-3) cm(2) V-1) derives mainly from the record long hole carrier lifetime (over 25 mu s). The easily scalable crystal growth and high-energy resolution, highlight cesium lead bromide as an exceptional next generation material for room temperature radiation detection.

引用

页数：8

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