Acetone vapour-assisted growth of 2D single-crystalline organic lead halide perovskite microplates and their temperature-enhanced photoluminescence. Issue 26 (18th April 2018)

• Record Type: Journal Article
• Authors: Zhai, Wenhao; Ge, Chaoyang; Fang, Xin; Zhang, Kun; Tian, Cheng; Yuan, Kai; Sun, Shuren; Li, Yanping; Chen, Weixi; Ran, Guangzhao
• Is Part Of: RSC advances. Volume 8:Issue 26(2018)
• Page Start: 14527
• Page End: 14531
• Publication Date: 2018-04-18
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra00583d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : We report an acetone vapour-assisted method to grow single-crystalline 2D perovskite microplates and find their temperature-enhanced photoluminescence. Abstract : We adopt an acetone vapour-assisted method to grow high quality single-crystalline microplates of two-dimensional (2D) perovskite, 2-phenylethylammonium lead bromide [(C6 H5 C2 H4 NH3 )2 PbBr4 ]. The microplates, converted from the spin-coated films, are well-defined rectangles. Temperature dependent photoluminescence (PL) spectroscopy shows that the band gap PL is enhanced markedly with increasing temperature up to 218 K, accompanied by the quenching of the PL related to the trap states, which perhaps results from the exciton–phonon couplings. The optical phonon energy around 50 meV and the exciton binding energy around 120 meV are derived by fitting the band gap PL linewidths and intensities at different temperatures, respectively.