期刊
NANOPHOTONICS
卷 10, 期 8, 页码 2103-2143出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2021-0033
关键词
light emission; light-emitting diode; light outcoupling; perovskite
资金
- National Research Foundation, Prime Minister's Office, Singapore, under its Competitive Research Programme (CRP Award) [NRFCRP14-2014-03]
- National Research Foundation, Prime Minister's Office, Singapore under its Intra-CREATE Collaborative Grant [NRF2018-ITC001-001]
- Ministry of Education (MOE) under AcRF Tier 2 [2018-T2-1-075, 2019-T2-2-106]
- A*A*STARgs6: National Robotics Programme [W1925d0106]
Perovskite semiconductors have shown rapid development in optoelectronic applications, particularly in photovoltaics and light emission. There is still room for optimization in improving external efficiencies and addressing stability issues. Through materials engineering and careful control of optical processes, higher efficiency light propagation and outcoupling can be achieved.
Perovskite semiconductors have experienced meteoric rise in a variety of optoelectronic applications. With a strong foothold on photovoltaics, much focus now lies on their light emission applications. Rapid progress in materials engineering have led to the demonstration of external quantum efficiencies that surpass the previously established theoretical limits. However, there remains much scope to further optimize the light propagation inside the device stack through careful tailoring of the optical processes that take place at the bulk and interface levels. Photon recycling in the emitter material followed by efficient outcoupling can result in boosting external efficiencies up to 100%. In addition, the poor ambient and operational stability of these materials and devices restrict further commercialization efforts. With best operational lifetimes of only a few hours reported, there is a long way to go before perovskite LEDs can be perceived as reliable alternatives to more established technologies like organic or quantum dot-based LED devices. This review article starts with the discussions of the mechanism of luminescence in these perovskite materials and factors impacting it. It then looks at the possible routes to achieve efficient outcoupling through nanostructuring of the emitter and the substrate. Next, we analyse the instability issues of perovskite-based LEDs from a photophysical standpoint, taking into consideration the underlying phenomena pertaining to defects, and summarize recent advances in mitigating the same. Finally, we provide an outlook on the possible routes forward for the field and propose new avenues to maximally exploit the excellent light-emitting capabilities of this family of semiconductors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据