摘要
采用室温合成法制备出CsPbBr3钙钛矿量子点,并采用乙酸乙酯对量子点进行了一次、二次和三次清洗,以控制其表面配体密度。然后,利用合成并经过清洗的钙钛矿量子点制备了结构为ITO/PEDOT∶PSS/PTAA/CsPbBr3 QD/TPBi/LiF/Al的电致发光二极管(QLED)。研究了经不同清洗次数的量子点材料制备的器件的光电性能。结果表明,清洗2次的量子点在电荷注入与溶液稳定性之间得到平衡,利用其制备的钙钛矿QLED获得了最大亮度为1405cd/m^(2)、外量子效率为0.6%、色坐标为(0.127,0.559)的绿光发射。
CsPbBr3 perovskite quantum dots were prepared by room temperature synthesis,and the surface ligand density was controlled by the cleaning times.By preparing the device structure as ITO/PEDOT∶PSS/PTAA/CsPbBr3 QD/TPBi/LiF/Al,the influence of cleaning times on the electroluminescent device was studied.The results show that when the quantum dots were cleaned twice,they can get balance between the charge injection and liquor stability,and a green perovskite QLED with a maximum brightness of 1 405 cd/m^(2),an external quantum efficiency of 0.6%,and a color coordinate of(0.127,0.559)was obtained.
作者
王振
卢永生
陈家雯
肖飞
梁真山
彭悦
陈威威
张文霞
戚飞
张楠
张丽
WANG Zhen;LU Yongsheng;CHEN Jiawen;XIAOFei;LIANGZhenshan;PENG Yue;CHEN Weiwei;ZHANG Wenxia;QI Fei;ZHANG Nan;ZHANG Li(Key Lab.of Microelectronic Engineering,School of Optoelectronics Engineering,Chongqing University of Posts and Telecommunications.Chongqing 400065,CHN;Chongqing Nanan Teacher,Training Academy,Chongqing 400060.CHN)
出处
《半导体光电》
CAS
北大核心
2021年第1期40-44,共5页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(61804020)
重庆市基础研究与前沿探索项目(cstc2018jcyjAX0462,cstc2018jcyjAX0547,cstc2018jcyjAX0560)
重庆市教委科学技术研究项目(KJQN201900643,KJQN201900630)。
关键词
钙钛矿
量子点
清洗次数
发光二极管
perovskite
quantum dots
washing time
light emitting diode
