Paper Substrates Based Flexible Red-Emitting Perovskite Nanocrystal Light-Emitting Diodes
Feisong Qin, Min Lu, Siqi Sun, Po Lu, Nannan Feng, Yanbo Gao, Xue Bai, Zhennan Wu, Junhua Hu, Yù Zhang
Abstract
Perovskite nanocrystals (NCs) have shown great potential in flexible light-emitting diodes (LEDs) due to their ease of synthesis and excellent optoelectronic properties. In the field of flexible LEDs, the selection of substrate for different applications is still a key issue. Herein, we report a highly flexible red-emitting perovskite light-emitting diode (PeLED) by utilizing Polymethyl methacrylate (PMMA) modified printing paper as substrates. The flexible PeLEDs on printing paper/PMMA substrate exhibited a maximum luminance of 1330 cd/ <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{m}^{{2}}$ </tex-math></inline-formula> and a maximum external quantum efficiency (EQE) of 8.5%. This extension of substrate to paper will widen the opportunity of PeLEDs in extremely flexible and inexpensive applications.