紫外激励发光薄膜的下转换效率测试研究

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.

参考文献

[1] Cao Y, Parker I D, Yu G, et al.. Improved quantum efficiency for electroluminescence in semiconducting polymers[J]. Nature, 1998, 397(6718): 414-417.

[2] Halls J J M, Walsh C A, Greenham N C, et al.. Efficient photodiodes from interpenetrating polymer network[J]. Nature, 1995, 376: 498-500.

[3] 刘善鹏, 白钰, 刘向, 等. 利用缓变结提高蓝色有机发光二极管的寿命[J]. 光学学报, 2007, 27(9): 1687-1690.

Liu Shanpeng, Bai Yu, Liu Xiang, et al.. Lifetime prolongation by graded junction for blue organic light emitting diodes[J]. Acta Optica Sinica, 2007, 27(9): 1687-1690.

[4] Park S H, Roy A, Beaupré S, et al.. Bulk heterojunction solar cells with internal quantum efficiency approaching 100%[J]. Nature Photonics, 2009, 3(5): 297-302.

[5] 王丽辉, 王孝坤, 陈波. 增强CCD 紫外和极紫外成像的荧光物质的研究[J]. 光学技术, 2006, 32(z1): 479-481.

Wang Lihui, Wang Xiaokun, Chen Bo. Study of ultraviolet and extreme ultraviolet phosphors for imaging detector[J]. Optical Technique, 2006, 32(z1): 479-481.

[6] 赵发财, 杨小虎, 孙权社. 一种应用于紫外成像系统的紫外可见转换膜测试研究[J]. 光学学报, 2014, 34(s2): s216003.

Zhao Facai, Yang Xiaohu, Sun Quanshe. Performance research on the ultraviolet visible conversion film for ultraviolet imaging system[J]. Acta Optica Sinica, 2014, 34(s2): s216003.

[7] Walter V. Thin-film scintilla tors for extended ultraviolet (UV) response silicon detectors[C]. SPIE, 1979: 90-94.

[8] Wendy A R F, Martin J K, Arokia N. UV- responsive CCD image sensors with enhanced inorganic phosphor coatings[J]. IEEE Transactions on Electron Devices, 2003, 50(2): 352-358.

[9] John C D M, Wittmann H F, Friend R H. An improved experimental determination of external photoluminescence quantum efficiency[J]. Advanced Materials, 1997, 9(3): 96-101.

[10] Johnson A R, Lee S J, Klein J, et al.. Absolute photoluminescence quantum efficiency measurement of light-emitting thin films[J]. Review of Scientific Instruments, 2007, 78(9): 096101.

[11] 张大伟, 田鑫, 黄元申, 等. CCD 紫外敏感Lumogen薄膜制备与光谱表征[J]. 光谱学与光谱分析, 2010, 30(5): 1171-1174.

Zhang Dawei, Tian Xin, Huang Yuanshen, et al.. Preparation and spectral characterization of lumogencoatings for UV-responsive CCD image sensors[J]. Spectroscopy and Spectral Analysis, 2010, 30(5): 1171-1174.

[12] Blouke M M, Cowens M W, Hall J E, et al.. Ultraviolet down converting phosphor for use with silicon CCD imagers[J]. Applied optics, 1980, 19(19): 3318-3321.

[13] Yang B, Li Y, Xie M G. Photoeletricity capability of imager detector with coated blends of polymer and perylene or coronene[J]. Chinese Physics Letters, 2003, 20(1): 161-163.

[14] Cowens M W, Blouke M M, Fairchild T, et al.. Coronene and liumogen as VUV sensitive coatings for Si CCD imagers: a comparison [J]. Applied Optics, 1980, 19(22): 3727-3728.

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.

紫外激励发光薄膜的下转换效率测试研究

关于本站 Cookie 的使用提示

全站搜索

紫外激励发光薄膜的下转换效率测试研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索