Responsivity and detectivity enhancements by graphene overlay on normal-incident multicolor quantum grid infrared photodetectors

Bor Wei Liang, Chiu Chang Huang, Song Po Chao, Kuang Ju Kao, Kristan Bryan Simbulan, Yann Wen Lan, Chieh Hsiung Kuan

研究成果: 雜誌貢獻期刊論文同行評審

摘要

An efficient and effective method to achieve high responsivity and specific detectivity, particularly for normal-incident quantum well infrared photodetectors (QWIPs), is proposed in this study. By combining superlattice (SL) structure, grating structures, and graphene monolayer onto traditional QWIP designs, a graphene-covered multicolor quantum grid infrared photodetector (QGIP) with improved optoelectrical properties is developed. The enhancements of the device’s responsivity and specific detectivity are about 7-fold and 20-fold, respectively, which resulted from an increase in the charge depletion region and the generation of extra photoelectrons due to graphene-semiconductor heterojunction. This method provides a potential candidate for future high-performance photodetectors.

原文英語
頁(從 - 到)2456-2465
頁數10
期刊Optics Express
28
發行號2
DOIs
出版狀態已發佈 - 2020 一月 20

ASJC Scopus subject areas

  • 原子與分子物理與光學

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