【論文摘要】p-Cu_2O/n-Si異質結光電二極體的雙功能模式

【論文摘要】Dual functional modes for p-Cu_2O/n-Si heterojunction photodiodes

魏恩雋(En-Chun Wei) ； 袁佳澤(Chia-Tse Yuan) ； 黃俊穎(Chun-Ying Huang)

《真空科技》 33卷4期 (2020/12) Pp. 25-25

摘要

眾多應用需具有多功能模式的光電檢測器（PD）。而這項研究研發了簡單構造的雙功能PD，該結構使用了奈米結構的p-Cu_2O/n-Si異質結。該元件具有0.5 V的開路電壓（Voc）的自供電特性，並且在-5 V的逆向偏壓下具有3780％的外部量子效率（EQE）。而在低逆向偏壓下，EQE較高。這是因為陷井的缺陷會導致電荷從電極填入，因此產生了偏壓。納米結構的p-Cu_2O/n-Si異質結在自供電模式下也具較高響應速度（＜10 ms），因為在p-n結内有內置電勢。這項研究表明，奈米結構的p-Cu_2O/n-Si異質接面可當自供電PD來降低功耗，並具有高內部增益的光電倍增（PM）型PD。

關鍵字

自供電 ； 氧化亞銅 ； 光電倍增 ； 雙功能

並列摘要

Many applications require a photodetector (PD) with multiple functional modes. This study demonstrates a dual functional PD with a simple structure that uses a p-Cu_2O/n-Si heterojunction. This device features a self-powering characteristic for an open-circuit voltage (V_(oe)) of 0.55 V and exhibits an external quantum efficiency (EQE) of 3780% at a reverse bias of -5 V. There is a high EQE at low reverse-bias because trapped holes cause charge to be injected from the electrode. The p-Cu_2O/n-Si heterojunction also has a high response speed (＜10 ms) in the self-powered mode because there is a built-in potential within p-n junction. This study shows that a p-Cu_2O/n- Si heterojunction acts as a self-powered PD for reducing power consumption and as a PM-type PD with high internal gain.

並列關鍵字

self-powered ； Cu_2O ； photomultiplication ； dual functional