NIR to Visible Light Upconversion Devices Comprising an NIR Charge Generation Layer and a Perovskite Emitter

• DOI: 10.1002/adom.201801084
• Publication Date: 2018-10-25T06:50:42Z
• Authors: Ning Li; Ying Suet Lau; Zuo Xiao; Liming Ding; Furong Zhu
• Keywords: Photon Upconversion; Visible spectrum; Green-light

Abstract Near‐infrared (NIR) to visible light upconversion is of significant importance in many applications, including thermal imaging, bioimaging, night vision, and wellness monitoring. Here, the effort develop a high‐performing NIR saturated green device comprising front solution‐processable organic bulk heterojunction charge generation layer (CGL) an upper CsPbBr 3 perovskite light‐emitting diode (LED) unit reported. The CGL, based on blend NIR‐sensitive donor polymer nonfullerene acceptor, enables efficient hole injection LED presence also serves as optical outcoupling enhance emission by LED. ‐based has narrow spectrum with peak wavelength 520 nm, corresponding wavelengths near response human eye, advantage imaging applications. Based process, pixel‐less demonstrated, which can be operated at low voltage V. results are very encouraging, revealing for application imaging.