Perspective on single-emissive-layer white-LED based on perovskites

Perovskite emitters have attracted great attention in recent years owing to their excellent photoelectric performance with low-cost potential. Some very recent studies have revealed that perovskites not only have narrow emitting peak with high purity but also have multi-color or broad spectrum in entire visible light, even some single emissive layer-based white perovskite light-emitting diodes (SEL-WPeLEDs) have been confirmed, showing promise in lighting and display. In this Perspective, we summarized the issues and challenges faced by these perovskite-based SEL-WLEDs and proposed some feasible suggestions in improving their light-emitting performance, hoping to promote their applications in lighting and other optoelectronic devices.