相位分布管理的准二维钙钛矿薄膜在纳秒脉冲激光泵浦下实现高效放大自发发射  

Phase distribution management in quasi-2D perovskite films toward highly efficient amplified spontaneous emission pumped by nanosecond pulsed laser

作　　者：韦晓燕 刘征征 杨洁 唐孝生 王艳平 黄业雄 姚亿洪 徐新鑫 皮明雨 杜鹃 张丁可 Xiaoyan Wei;Zhengzheng Liu;Jie Yang;Xiaosheng Tang;Yanping Wang;Yexiong Huang;Yihong Yao;Xinxin Xu;Mingyu Pi;Juan Du;Dingke Zhang(School of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 401331,China;State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;College of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Chongqing Research Institute,Changchun University of Science and Technology,Chongqing 401135,China;School of Physics and Optoelectronic Engineering,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China)

机构地区：[1]School of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 401331,China [2]State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [3]College of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China [4]Chongqing Research Institute,Changchun University of Science and Technology,Chongqing 401135,China [5]School of Physics and Optoelectronic Engineering,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China

出　　处：《Science China Materials》2024年第3期921-930,共10页中国科学（材料科学）（英文版）

基　　金：supported by the Natural Science Foundation of Chongqing (CSTB2023NSCQ-MSX0687, cstc2021jcyjmsxm X0736, and cstc2021jcyj-msxm X0930);“Chunhui” Plan Cooperative Scientific Research Project of the Ministry of Education of China(HZKY20220214);China Postdoctoral Science Foundation (2021M691487);the National Natural Science Foundation of China (62305037, 62375032,61975023, 62375276, 62375060, and 22072010);the Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN202200544, KJQN202100510 and KJQN202100507);the Project of Chongqing Normal University Foundation (20XLB034);Shanghai Pilot Program for Basic Research (22JC1403200);the National Key Research and Development Program of China (2018YFB2200500 and 2022YFA1604403);the Open Fund of the State Key Laboratory of High Field Laser Physics(Shanghai Institute of Optics and Fine Mechanics);the Innovation and Entrepreneurship Training Program for College Students (S202210637047,S202210637042, and S2022051101220)。

摘　　要：准二维钙钛矿表现出独特的光物理性质,这使它们成为激光技术潜在进步的优秀候选材料.高性能纳秒脉冲激光和放大自发发射(ASE)是实现连续波抽运光电泵浦激光器的关键工艺.然而,在纳秒脉冲激光泵浦下发展准二维钙钛矿ASE或激光仍然存在一些困难,包括表面缺陷浓度高、俄歇复合和能量传递效率低.本文通过无添加剂的Cs^(+)阳离子掺杂策略,可以很好地控制准二维钙钛矿膜的形貌和相分布,从而解决了低n相导致的能量传递途径不足的问题.本文通过快速的能量传递过程揭示了增益性质和载流子复合.基于此,掺杂适当比例Cs^(+)阳离子的PEA_(2)(FA_(0.7)Cs_(0.3))_(2)Pb_(3)Br_(10)钙钛矿膜的净增益系数比原始钙钛矿薄膜提高了近3倍,从而将纳秒激光激发下的放大自发发射阈值降低到1/3.研究结果表明,在准二维钙钛矿中掺杂Cs^(+)可为实现高性能激光器件的相位分布设计提供见解.Quasi-two-dimensional(Quasi-2D) perovskites exhibit unique photophysical properties, which make them an excellent candidate for potential advancements in laser technology. Nanosecond pulse laser pumped lasing and amplified spontaneous emission(ASE) with high performance is the key process to realize the continuous wave pumped optically and electrically pumped laser. However, several difficulties still exist in the development of quasi-2D perovskites ASE or lasing under nanosecond pulsed laser pumping, including the high concentration of surface defects, Auger recombination and inefficient energy transfer. Herein, by an additive-free strategy through Cs^(+)cation doping, the morphology and phase distribution of quasi-2D perovskite films could be well managed and thus the insufficient energy transfer pathway caused by low-n phases was almost entirely resolved. The gain nature and carrier recombination were revealed with fast energy transfer process. Based on this, the net gain coefficient of the PEA_(2)(FA_(0.7)Cs_(0.3))_(2)Pb_(3)Br_(10)(PEA^(+)= phenylethylammonium;FA^(+)= formamidinium) perovskite films with an appropriate proportion of Cs^(+)cation displayed a nearly three-fold increase than that of the pristine perovskite film, thereby significantly lowering the ASE threshold under nanosecond laser excitation to a third. Our results suggest that the Cs^(+)-doped strategy in quasi-2D perovskites could provide insights into the design by phase distribution to realize high-performance laser devices in the future.

关 键 词：quasi-2D perovskite cesium cation amplified spontaneous emission energy transfer phase distribution 

分 类 号：TB383.2[一般工业技术—材料科学与工程]