Affiliation:
1. School of Chemistry & Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory for Metal Matrix Composite Materials Shanghai Jiao Tong University Shanghai 200240 China
2. Center for Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 P. R. China
Abstract
AbstractIn addition to electrically driven organic light‐emitting diode (OLED) displays that rely on complicated and costly circuits for switching individual pixel illumination, developing a facile approach that structures pixel‐free light‐emitting displays with exceptional precision and spatial resolution via external photo‐modulation holds significant importance for advancing consumer electronics. Here, optically switchable organic light‐emitting pixel‐free displays (OSPFDs) are presented and fabricated by judiciously combining an adaptive photosensitive ionic polymer as electron transport materials (ETM) with external photo‐modulation as the switching mode while ensuring superior illumination performance and seamless imaging capability. By irradiating the solution‐processed OSPFDs with light at specific wavelengths, efficient and reversible tuning of both electron transport and electroluminescence is achieved simultaneously. This remarkable control is achieved by altering the energetic matching within OSPFDs, which also exhibits a high level of universality and adjustable flexibility in the three primary color‐based light‐emitting displays. Moreover, the ease of creating and erasing desired pixel‐free emitting patterns through a non‐invasive photopatterning process within a single OSPFD is demonstrated, thereby rendering this approach promising for commercial displaying devices and highly precise pixelated illuminants.
Funder
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science