光学学报, 2015, 35 (10): 1031001, 网络出版: 2015-10-08  

紫外激励发光薄膜的下转换效率测试研究

Measurement of Conversion Efficiency of Ultraviolet Down-Conversion Light-Emitting Thin Films
舒顺朋 1,2,*陶春先 1,2阮俊 1,2洪瑞金 1,2张大伟 1,2
作者单位
1 上海市现代光学系统重点实验室教育部光学仪器与系统工程中心, 上海 200093
2 上海理工大学光电信息与计算机工程学院, 上海200093
摘要
紫外下转换发光薄膜在很多光电器件中有重要应用,由于转换效率可以准确地表征发光薄膜的性能,所以研究发光薄膜在紫外激励下的转换效率十分关键。利用积分球收集激发和发射光子,结合发射光谱的光子能量分布,建立了转换效率的计算方法,克服了发光薄膜的各向异性以及波导效应干扰。基于该测试方法搭建的测试系统实现了对220~400 nm 紫外光激励下Lumogen 薄膜和Coronene 薄膜的转换效率测试。测试实验验证了该系统的可行性和可靠性,在研究紫外激励下发光薄膜发光效率上具有较大的应用价值。
Abstract
Because conversion efficiency (CE) can characterize ultraviolet (UV) down-conversion light-emitting thin films accurately which is very useful in photoelectric devices, the research of CE is very crucial. An experimental determination of conversion efficiency of UV down- conversion light- emitting thin films based on using an integrating sphere to collect the photons is proposed, which solves the problem owing to disregarding anisotropy and wave-guiding effects in determining the angular distribution of the emission. A new computing method by using the emission spectrum of samples is also proposed, which is easy to compute. Demonstration experiments of Lumogen and Coronene, two fluorescent materials often applied in UV down- conversion field are made. Demonstration experiments show that this method is more reliable and more accurate, which should be recommended for computing CE in UV down-conversion research field.

舒顺朋, 陶春先, 阮俊, 洪瑞金, 张大伟. 紫外激励发光薄膜的下转换效率测试研究[J]. 光学学报, 2015, 35(10): 1031001. Shu Shunpeng, Tao Chunxian, Ruan Jun, Hong Ruijin, Zhang Dawei. Measurement of Conversion Efficiency of Ultraviolet Down-Conversion Light-Emitting Thin Films[J]. Acta Optica Sinica, 2015, 35(10): 1031001.

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