Tunable luminescent CsPb_2Br_5 nanoplatelets:applications in light-emitting diodes and photodetector

来源 :Photonics Research | 被引量 : 0次 | 上传用户:mingliqq
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Unlike organic–inorganic hybrid perovskites, all-inorganic cesium lead halide perovskites hold great promise for developing high-performance optoelectronic devices, owing to their improved stability. Herein, we investigate the perovskite-related CsPb_2 Br_5 nanoplatelets(NPLs) with tunable emission wavelengths via changing the reaction temperatures to 100°C, 120°C, and 140°C. Reaction temperature plays a key role in determining the shapes and thicknesses of the resulting CsPb_2 Br_5 NPLs. A higher temperature is in favor of the formation of smaller and thicker NPLs. To develop their potential applications in optoelectronic devices, green light emitting diodes(LEDs) and photodetectors based on CsPb_2 Br_5 NPLs are fabricated. The green LEDs based on CsPb_2 Br_5 NPLs synthesized at 140°C exhibit an excellent pure green emission(full width at half-maximum of <20 nm) and display a luminous efficiency of 34.49 lm∕W under an operation current of 10 m A. Moreover, the photodetector based on CsPb_2 Br_5 NPLs synthesized at 100°C has better performance with a rise time of 0.426 s, a decay time of0.422 s, and a ratio of the current(with and without irradiation) of 364%. Herein, we investigate the perovskite-related CsPb_2 Br_5 nanoplatelets (NPLs) with tunable emission wavelengths changing the reaction temperatures to 100 ° C, 120 ° C, and 140 ° C. Reaction temperature plays a key role in determining the shapes and thicknesses of the resulting CsPb_2 Br_5 NPLs. A higher temperature is in favor of the formation of smaller and thicker The green LEDs based on CsPb_2 Br_5 NPLs synthesized at 140 ° C exhibit an excellent pure green emission (full width at half-maximum of <20 nm) and display a luminous efficiency of 34.49 lm / W under an operation current of 10 m A. Moreover, the photodetector ba sed on CsPb_2 Br_5 NPLs synthesized at 100 ° C has better performance with a rise time of 0.426 s, a decay time of 0.222 s, and a ratio of the current with and without irradiation of 364%.
其他文献
从今年3月末开始,中国政府针对经济运行中出现的过热现象,发出了非常明显的紧缩性政策信号,并实施了更加严厉的经济和行政的调控手段。这样一来,中国经济会否因此改变快速发
认识植物、扦插幼苗、拓画树叶,彩叶林间洋溢着天真烂漫,回荡着笑语欢歌。9月30日,来自北京市登莱小学的800多名小朋友来到北京市黄垡苗圃,在老师和苗圃园丁的带领下,上了一
德州仪器(TI)推出两款新型器件,有助于减小电机驱动应用的尺寸和重量。当两者结合使用时,DRV832x无刷直流(BLDC)栅极驱动器和CSD88584/99NexFET电源模块只需占用511mm2的电路
2010年由国家体育总局、教育部联合发文规定自9月1日起在全国普通中小学(含特殊教育学校)、中等职业学校中推广实施《全国中小学生系列武术健身操》,武术操开始风靡各大、小
详细阐述了湿陷性黄土地段隧道双侧壁上下导坑开挖施工时的材料及机具要求,通过在山平高速公路二道梁隧道湿陷性黄土地段V级浅埋围岩开挖中成功实践应用,指出了施工质量和安
我国的第一家网上书店在杭州关门,上海的第一家网上商店“上海亿祥购物中心”开业仅半年就夭折了,此类破产关门事例不一而足。这一切无不在表明,笼罩在电子商务之上的迷雾始终没
5月21日,国家计委发给各大新闻媒体的传真称,国家计委决定放开国产轿车价格,由生产经营企业根据市场供求情况自主确定价格,以促进国产轿车市场的竞争和国产轿车的消费。 May
理论分析了LED的电流/电压(I/V)特性与PN结结温的关系,揭示了温度函数的串联电阻项对I/V曲线的影响,并应用这一影响提出了一种基于串联电阻测量LED结温的方法。该方法只需多
墨菲定律变体之一:“如果几件事都可能出错,首先出错的往往是会造成最大损失的那一件。”如果一个系统可能产生直接或间接的致命威胁,例如,机器故障等,那么设计该系统时,必须
一、家电和信息技术产品有可能最先实现零关税。入世后,中国将会同意外国投资者进入我国电信服务业,允许外资在所有电信服务业中占49%的股权,在增值服务和寻呼服务业中占51%的股权。因