Abstract
Abstract During the last two decades, III-nitride-based quantum dots (QDs) have attracted great attentions for optoelectronic applications due to their unique electronic properties. In this paper, we first present an overview on the techniques of fabrication for III-nitride-based QDs. Then various optoelectronic devices such as QD lasers, QD light-emitting diodes (LEDs), QD infrared photodetectors (QDIPs) and QD intermediate band (QDIB) solar cells (SCs) are discussed. Finally, we focus on the future research directions and how the challenges can be overcome.
Highlights
Investigations of III-nitride-based semiconductors have been very extensive for applications on light sources with short wavelength, and on highspeed/high-power electron devices, over the last decade
Nitride quantum dots (QDs) are being used in lasers, light-emitting diodes (LEDs), infrared photodetectors, solar cells (SCs), single photon sources (SPSs), intersubband light sources and other optoelectronic devices
We have reviewed the recent progress of III-nitridebased QDs and their optoelectronic applications such as lasers, LEDs, infrared photodetectors, and SCs
Summary
Investigations of III-nitride-based semiconductors have been very extensive for applications on light sources with short wavelength, and on highspeed/high-power electron devices, over the last decade. The existence of quantumconfined Stark effect (QCSE) induced by the strong built-in piezoelectric field in the highly strained high In-content InGaN/GaN multi-QWs (MQWs) results in a reduction in the carrier recombination rate by increasing the spatial separation between the electron and hole wave functions involved in the radiative recombination process [10,11]. It is much easier to grow higher In composition QDs and even 100% InN QD structures can be grown [17] This suggests that InGaN QDs are promising candidates to achieve efficient optical recombination at longer wavelength. QD devices have become new focus in both scientific research and industrial investment for its wide applications in recent years
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