Boosting the broadband orange emission in organic–inorganic hybrid (DPG)3InBr6via antimony doping. (12th April 2023)

• Record Type: Journal Article
• Authors: Jin, Shuya; Wei, Qilin; Peng, Hui; Ke, Bao; Lin, Wenchao; He, Bin; Zhong, Xianci; Zou, Bingsuo
• Is Part Of: New journal of chemistry. Volume 47:Number 17(2023)
• Page Start: 8249
• Page End: 8257
• Publication Date: 2023-04-12
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d3nj01019h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : (DPG)3 InBr6 has two emission bands located at 470 and 630 nm. After Sb 3+ doping, the weak high energy emission disappears which is derived from its energy transfer to low energy state. Inset: the synthesized single crystal photo under daylight and UV-365 nm. Abstract : Organic–inorganic hybrid metal halides are considered potential candidates for solid-state lighting (SSL) and display technology due to their unique photophysical properties, facile synthesis and low costs. Among them, In(iii )-based metal halides stand out due to their broadband emission, low-toxicity, and remarkable stability. Herein, we developed a new lead-free metal halide of (DPG)3 InBr6 (DPG = 1, 3-diphenylguanidine), in which the isolated [InBr6 ] 3− octahedrons are surrounded by an organic ligand with a photoluminescence quantum yield (PLQY) of 30.4%. To enhance this, Sb-doped (DPG)3 InBr6 is prepared, which induces extra excitons, and produces broad band emission with a PLQY of 99.2% and a full width at half maximum (FWHM) of 166 nm with a large Stokes shift of 232 nm. This broad emission band is derived from the triplet self-trapped excitons (STEs) out of the Pyramid SbBr5 and octahedral InBr6 with high Huang–Rhys factor (45.5). Together with highly efficient broadband emission and remarkable stability of Sb-doped (DPG)3 InBr6, a high-performance white-light emitting diode (WLED) with a high color-rendering index (CRI) of 86.9 and a luminous efficacy of 30.9 lm W −1 is demonstrated, indicating its potential application in photonic devices.