基于积分球系统的有机-无机杂化钙钛矿发光二极管量子转化效率的测量

Quantum Conversion Efficiency Measurement of Organic-Inorganic Hybrid Perovskite Light-Emitting Diode Based on Integrating Sphere System

有机-无机杂化钙钛矿发光二极管(PeLED)作为一种新型发光器件,具有原料来源广、器件制备简单和载流子迁移率高等优点,使其成为显示与发光领域的研究热点之一。由于PeLED存在发光稳定性差和器件均匀发光区域小的缺点,并且对于PeLED量子效率的测试没有统一的测量方法。鉴于此,提出一种新型的PeLED量子转化效率测量系统。首先采用小尺寸积分球并结合光谱测量系统对PeLED发射光进行收集,最终得到其量子转化效率。然后采用GaN发光二极管的数据作为标准数据,并对该系统的中心波长、亮度及辐射亮度进行校准。最后使用该测量系统测量PeLED器件的性能。实验结果表明,当电压为3.2V时,PeLED的外量子效率最高,值为0.089%,与参考值的误差不超过6%。

Organic-inorganic hybrid perovskite light-emitting diodes(PeLEDs)is a new type of light-emitting device,it have many advantages,including a wide range of raw material sources,simple device preparation,and high carrier mobility,making it one of the research hotspot in the field of displays and luminescence.Despite this,PeLEDs do have disadvantages,such as poor luminescence stability and small,uniform luminous areas,and there is no unified measurement method for testing PeLED quantum efficiency.In light of this,we propose a new type of PeLED quantum conversion efficiency measurement system.Using a small-sized integrating sphere combined with a spectrum measurement system to collect the PeLED light emission,the quantum conversion efficiency is determined.Standard GaN light-emitting diode data is used to calibrate the center wavelength,brightness,and radiance of the system.Finally,this system is used to measure the performance of actual PeLED devices.Experimental results show that the PeLED external quantum efficiency is the highest(0.089%)at a voltage of 3.2V,and the error determined from the reference did not exceed 6%.