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 Highly Luminescence MgZnO/ZnO Multiple quantum wells for Photonics Devices
Tác giả hoặc Nhóm tác giả: Muhammad Zakria, Thanh Tung Huynh, Francis CC Ling, Shi Chen Su, Matthew R Phillips, Cuong Ton-That
Nơi đăng: ACS Applied Nano Materials; Số: xxx;Từ->đến trang: xxx-xxx;Năm: 2019
Lĩnh vực: Khoa học; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
Multiple quantum wells (MQWs) have enabled a myriad of technological applications; however, their optical emission is currently severely constrained by the presence of undesirable defects, which limit their performance in advanced photonic devices. Here we present a new route to achieve highly luminescent oxide-based MQWs by rapid remote plasma annealing (RRPA) in hydrogen. We demonstrate that the optical emission from the MgZnO/ZnO MQWs can be enhanced substantially by this plasma method, with its emission intensity enhanced by more than 10 times after being treated for 40 seconds. Concurrently, the emissions associated with both basal stacking faults and point defects are completely quenched. Based on temperature- and excitation density-dependent luminescence results, the enhancement of the MQW emission is attributed to the passivation of competitive recombination channels …
ABSTRACT
Multiple quantum wells (MQWs) have enabled a myriad of technological applications; however, their optical emission is currently severely constrained by the presence of undesirable defects, which limit their performance in advanced photonic devices. Here we present a new route to achieve highly luminescent oxide-based MQWs by rapid remote plasma annealing (RRPA) in hydrogen. We demonstrate that the optical emission from the MgZnO/ZnO MQWs can be enhanced substantially by this plasma method, with its emission intensity enhanced by more than 10 times after being treated for 40 seconds. Concurrently, the emissions associated with both basal stacking faults and point defects are completely quenched. Based on temperature- and excitation density-dependent luminescence results, the enhancement of the MQW emission is attributed to the passivation of competitive recombination channels …
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