综合研究性实验试题A:三基色LED和硅光电池的光电特性及色度综合实验

Comprehensive test A:Photoelectric characteristics of trichromatic LEDs and silicon photocell and their chromaticity

介绍了第7届全国大学生物理实验竞赛综合研究性实验试题A的实验原理和试题内容,并给出了参考解答以及竞赛结果分析.综合研究性实验试题A为三基色LED和硅光电池的光电特性及色度综合实验,试题分为2部分:首先在未知硅光电池开路电压、光照度线性区间和LED电流与光功率关系的前提下,利用等效替代的方法研究硅光电池与LED的光电特性;其次区别于传统的色度学实验,根据红、绿、蓝LED中心波长和光电池的光强响应,调节三色LED电流,通过积分球匀光后得到给定的色坐标.试题考查了学生对物理基础知识的掌握、新知识的提取、实验方案的设计以及数据分析处理等能力,对物理实验综合能力有较高要求.

The experiment principle and content,solution and result analysis of the comprehensive test A of the 7th Chinese Undergraduate Physics Experiment Competition were given.The comprehensive test A consisted of two parts.Part 1was about how to study the photoelectric characteristics of silicon photocell and LEDs based on the equivalent substitution method while the linear interval between the open circuit voltage and illuminance of silicon photocell and the relationship between LED current and optical power were unkown.Part 2obtained the given color coordinates by adjusting the current of trichromatic LEDs and homogenization through integrating sphere according to the central wavelength of red,green and blue LEDs and the light intensity response of photocell,as was different from the traditional colorimetric experiment.The comprehensive test A investigated the students’ abilities to use the physical experiment methods and master the basic physical knowledge,as well as the abilities of the extraction of new knowledge,the design of experimental scheme and data analysis and processing.It also put forward higher requirements for the comprehensive ability of physical experiment.