New model could accelerate development of next - generation solar cells and LEDs

The race to develop more efficient solar cells, brighter displays, and lower-energy optoelectronic devices has increasingly focused on a class of materials known as two-dimensional (2D) perovskites. Scientists have long been attracted to these materials because they combine many of the desirable properties of conventional semiconductors with enhanced stability and strong light-matter interactions. Yet a fundamental challenge has hindered progress: understanding exactly how their microscopic structure controls their electronic behavior. A new study from Hanbat National University in South Korea may have provided an important piece of that puzzle. Published in Advanced Functional Materials, the research demonstrates that the dielectric screening environment plays a dominant role in governing excitonic behaviour…