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快速响应的垂直结构二维钙钛矿光电探测器

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制备基于二维钙钛矿(PEA)2(MA)4Pb5I16[PEA为C6H5(CH2)NH3,MA为CH3NH3]的垂直结构光电探测器,当二维钙钛矿薄膜厚度为280 nm时,器件的亮电流最大,500 nm处外量子效率达到90%,响应率达到0。37 A/W,探测率达到3。4×1012Jones(1 Jones=1cm·Hz1/2/W)。当二维钙钛矿薄膜厚度减小时,器件的响应时间没有持续减小,而在其厚度为80nm时器件的响应时间最短,这是受载流子渡越时间和钙钛矿薄膜质量双重影响下的结果。在二维钙钛矿薄膜厚度为80 nm的基础上,通过减小器件的有效面积,其最终实现了 113 ns的响应时间。本工作对推动低成本快速响应光电探测器的发展有着重要意义。
Fast-Response Vertical-Structure Two-Dimensional Perovskite Photodetector
A vertical-structure photodetector based on two-dimensional perovskite(PEA)2(MA)4Pb5I16[PEA is C6H5(CH2)NH3,MA is CH3NH3]is fabricated and its property is analyzed.The photocurrent of the device reaches a maximum when the thickness of the two-dimensional perovskite thin film is 280 nm,while at 500 nm,the external quantum efficiency reaches 90%,the responsivity reaches 0.37 A/W,and the detectivity reaches 3.4×1012 Jones(1 Jones=1 cm·Hz1/2/W).The response time of the device does not continue to decrease as the thickness of two-dimensional perovskite thin film decreases,but reaches a minimum at the thickness of 80 nm due to the effect of carrier transit time and the quality of perovskite thin film.By fixing the thickness of the two-dimensional perovskite film at 80 nm,we finally achieve a response time of 113 ns by reducing the effective area of the device.This work is of great significance to promote the development of low-cost and fast-response photodetectors.

photodetectortwo-dimensional perovskitefast responsevertical structure

张海博、冀婷、何嘉玉、石林林、李国辉、崔艳霞

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太原理工大学光电工程学院,山西太原030024

光电探测器 二维钙钛矿 快速响应 垂直结构

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金山西省重点研发国际合作计划山西省自然科学基金山西省自然科学基金山西省高等学校科技成果转化培育项目山西省重点研发计划吕梁市高层次科技人才引进专项项目吕梁市高层次科技人才引进专项项目

6192206062174117U21A2049661805172121043346190517362205235201803D42104420210302123154202103021231692020CG013202102150101007Rc2020206Rc2020207

2024

激光与光电子学进展
中国科学院上海光学精密机械研究所

激光与光电子学进展

CSTPCD北大核心
影响因子:1.153
ISSN:1006-4125
年,卷(期):2024.61(5)
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