物理化学学报 >> 1985, Vol. 1 >> Issue (01): 82 -88 .doi: 10.3866/PKU.WHXB19850111

研究论文 上一篇    下一篇

聚合物半导体光电转换的理论分析

田昭武   

  1. 厦门大学物理化学研究所
  • 收稿日期:1984-06-26 修回日期:1984-10-18 发布日期:1985-02-15
  • 通讯作者: 田昭武

THEORETICAL ANALYSIS ON THE PHOTOELECTRIC CONVERSION OF POLYMER SEMICONDUCTOR

Tian Zhaown   

  1. Institute of Physical Chemistry; Xiamen University; Xiamen; Fujian; China
  • Received:1984-06-26 Revised:1984-10-18 Published:1985-02-15
  • Contact: Tian Zhaown

摘要: 导电聚合物半导体的最大特点是掺杂物在工作条件下可以移动。这类“可移动掺杂物”型半导体已被许多研究者用为光生伏打效应的材料, 目前所得到光电转换效率普遍较低。本文提出这类光电极的物理模型和数学模型, 并用数值解法解决了这个边界问题; 理论分析表明这类“可移动掺杂物”型半导体最大光电转换效率可以接近于传统无机半导体的光电转换效率; 数值解提出必须注意提高这类半导体的载流子迁移率和体内复合寿命。

Abstract: Sunlight may be converted into electrical or chemical energy by semiconductors composed of suitably doped polymers (e.g. polyaeetylene). The mobility of the dopant in the polymer is significant and the concentration of dopant is not uniform in the semiconductor polymer because of the electric field in the space-charge region. The theoretical treatment for traditional semiconductor, even the depletion layer approximation cermet be applied to this case. It is interesting to study quantitatively the distributions of concenrations of dopant and carriers as well as the electric potential and field. In order to search for polymer semiconductor material as photoelectrode of high performance, it is necessary to study quantitative relationships between the conversion efficiency and various parameters of the semiconductor bulk properties.
For the steady state of a planar n-type semiconductor illuminated by monochromatic light, the following six simultaneous differential equations can be formulated:
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