Enhancing Light Extraction Efficiency and Luminance for Perovskite Light-Emitting Diodes Using Nanoporous Array Structure

Perovskite light-emitting diode (PeLED) have risen as potential contenders for advanced optoelectronic devices. As the critical performance metric for PeLED, the external quantum efficiency (EQE) is a pivotal parameter for assessing the proficiency of optoelectronic devices in the transformation of electrical energy into photovoltaic energy, ascertained through the internal quantum efficiency (IQE) and the efficiency of light extraction efficiency (LEE). Despite significant progress in EQE, given by IQE approaching unity, LEE remains disappointing and hinders the realization of efficient PeLEDs. In this study, we introduce a novel quantum dots (QDs) nano-porous substrate (NPS) that ameliorates the total internal reflection phenomenon in PeLED. Compared to traditional PeLED, the QD-NPS PeLED enhances the LEE by 2.8 times and achieves a 3.0-fold increase in the maximum luminance, promising widespread applications in display technology, and medical imaging, among other fields.