Antimony doped Cs2SnCl6 with bright and stable emission

• 作 者: Jinghui LI Zhifang TAN Manchen HU Chao CHEN Jiajun LUO Shunran LI Liang GAO Zewen XIAO Guangda NIU Jiang TANG
• 机 构: Wuhan National Laboratory for Optoelectronics(WNLO), Huazhong University of Science and Technology,
• 出 处: 光电子学前沿
• 发表日期: 2019年4期
• 关键词: perovskite lead-free antimony doping orange-red emission

Lead halide perovskites,with high photoluminescence efficiency and narrow-band emission,are promising materials for display and lighting.However,the lead toxicity and environmental sensitivity hinder their potential applications.Herein,a new antimony-doped lead-free inorganic perovskites variant Cs2SnCl6∶xSb is designed and synthesized.The perovskite variant Cs2SnC16∶xSb exhibits a broadband orange-red emission,with a photoluminescence quantum yield (PLQY) of 37％.The photoluminescence of Cs2SnC16∶xSb is caused by the ionoluminescence of Sb3+ within Cs2SnC16 matrix,which is verified by temperature dependent photoluminescence (PL) and PL decay measurements.In addition,the all inorganic structure renders Cs2SnCl6∶xSb with excellent thermal and water stability.Finally,a white light-emitting diode (white-LED) is fabricated by assembling Cs2SnCl6∶0.59％Sb,Cs2SnC16∶2.75％Bi and Ba2Sr2SiO4∶Eu2+ onto the commercial UV LED chips,and the color rendering index (CRI) reaches 81.