Element doping method for organic thin film solar cell

Abstract

The invention relates to an element doping method for an organic thin film solar cell. The organic thin film solar cell comprises a glass substrate, a transparent conductive oxide layer, a window layer, a light absorbing layer and a back electrode layer overlapped sequentially from bottom to top, wherein powder containing doping elements is placed on the surface of the light absorbing layer, the temperature of the light absorbing layer is made to reach 150 to 300 DEG C for 1 to 30 min, the powder is then removed, and the powder is inorganic salt or organic salt powder containing Zn or / and Sn. Through adopting the inorganic salt or organic salt powder containing Zn or / and Sn for doping, the surface and the inner part of the light absorbing layer are doped with Zn or / and Sn elements, and thus, the open circuit voltage, the short circuit current and a filling factor of the cell are improved, and the cell conversion efficiency is improved.

Description

technical field [0001] The invention belongs to the field of solar cell devices, and in particular relates to an element doping method for organic thin film solar cells. Background technique [0002] Thin-film solar cells are formed by sequentially plating multiple layers of thin-film materials on the surface of a substrate. For example, the structure may be: a glass substrate, a transparent conductive oxide (TCO) layer, a semiconductor layer, and a back electrode layer. The semiconductor layer generally includes a window layer and a light-absorbing layer. layer. Each layer of thin film material is formed by the same or different coating methods. For example, the transparent conductive layer can be coated by APCVD or PVD, the light-absorbing layer can be coated by PVD or VTD, the back electrode can be coated by PVD or printing, and different films can be doped Different elements to improve the performance of the battery. [0003] The production of traditional organic thin ...

AI Technical Summary

Problems solved by technology

Appropriate doping can increase the open circuit voltage, short-circuit current and fill factor of the battery, thereby improving the conversion efficiency of the battery; excessive doping may enrich the excess elements on the interface between the window layer and the light-absorbing layer, affecting the performance of the PN junction. Lead to decreased cell efficiency, reduced long-term stability, and may also cause a short circuit between the transparent conductive layer and the back electrode

Images