High efficiency Cu(In, Ga)Se2 thin-film solar cells doped Na on polyimide substrate

作者：Jiang Wei Long; Zhang Li; He Qing; Liu Wei; Yu Tao; Pang Jin Bo; Li Feng Yan; Li Chang Jian; Sun Yun^*

来源：Journal of Optoelectronics - Laser, 2010, 21(2): 222-226.

• CIGS thin films
• Cu(In , Ga)Se
• Device performance
• Electrical property
• Flexible polyimide substrate
• Grain size
• High conversion efficiency
• High efficiency
• Low-temperature process
• Polyimide substrate
• Structural and electrical properties
• Substrate temperature
• Thin-film solar cells
• XRD

The effects of Na incorporation on the structural and electrical properties of Cu(In, Ga)Se2(CIGS) thin films on polyimide(PI) substrate by low-temperature process are investigated. As shown by XRD, the diffusion of Ga is hindered by Na, the Na incorporation has no influence on the grain size of CIGS thin films. The device performances of solar cells based on CIGS thin films on PI with Na incorporation are remarkably improved due to the improvement of electrical properties of CIGS. The mechanism is that Na increases the carrier concentration and reduces the resistivity. A high conversion efficiency of 10.4% has been achieved on PI substrate by improving the Na incorporation process at the substrate temperature of 450 °C.

• 单位
  南开大学