Recently, the EQEs of blue PeLEDs have also exceeded 17%. PeLEDs have shown performance indicators constantly approaching the state-of-the-art organic and quantum dot LEDs, and exhibited unique advantages in terms of color purity, material cost, and preparation process.

Despite the fantastic progress, several challenges exist for PeLEDs to achieve commercial display applications.

On the one hand, the high-performance PeLEDs only worked in small active areas. When the active area expands, high nonuniformity of large-area active layers is the major obstacle. On the other hand, most researches on PeLEDs concentrate on prototype devices with a single emission pixel.

However, lagging in the technology of high-resolution, full-color perovskite array patterning strategies and device integration technologies, the step of PeLED displaying commercialization is strongly impeded. In addition, high-performance PeLEDs are mainly prepared based on rigid substrates, thus limiting their potential application scenarios. Perovskite materials have solution-processable properties and intrinsic mechanical flexibility, which provides the prospects for preparing perovskite-based flexible optoelectronic devices.

In a new paper published in Light: Advanced Manufacturing, a team of scientists, led by Professor Mingjian Yuan from Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, China, and co-workers summarizes the representative attempts for PeLEDs in commercial display applications, and discusses the key challenges as well as development prospects in this field.