A crystalline Si solar cell using a carbon nanotube thin film as the back electrode

ZHANG Ze-lin; ZHAO Ke; CUI Xian; YAO You-wei; WEI Jin-quan

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ZHANG Ze-lin, ZHAO Ke, CUI Xian, YAO You-wei, WEI Jin-quan. A crystalline Si solar cell using a carbon nanotube thin film as the back electrode. New Carbon Mater., 2019, 34(3): 302-306.

Citation:

ZHANG Ze-lin, ZHAO Ke, CUI Xian, YAO You-wei, WEI Jin-quan. A crystalline Si solar cell using a carbon nanotube thin film as the back electrode. New Carbon Mater., 2019, 34(3): 302-306.

ZHANG Ze-lin, ZHAO Ke, CUI Xian, YAO You-wei, WEI Jin-quan. A crystalline Si solar cell using a carbon nanotube thin film as the back electrode. New Carbon Mater., 2019, 34(3): 302-306.

Citation:

ZHANG Ze-lin, ZHAO Ke, CUI Xian, YAO You-wei, WEI Jin-quan. A crystalline Si solar cell using a carbon nanotube thin film as the back electrode. New Carbon Mater., 2019, 34(3): 302-306.

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A crystalline Si solar cell using a carbon nanotube thin film as the back electrode

1.
Key Lab for Advanced Materials Processing Technology of Education Ministry;State Key Lab of New Ceramic and Fine Processing;School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;
2.
Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China

Funds: Shenzhen Jiawei Photovol taic Lighting Co., Ltd. (20142001042).

Received Date: 2019-01-03
Accepted Date: 2019-06-27
Rev Recd Date: 2019-04-05
Publish Date: 2019-06-28

Abstract

Abstract

Due to their outstanding charge collecting and transport ability, carbon nanotubes (CNTs) can be used as electrode materials in solar cells. Here, we replaced the aluminum back electrode in a crystalline silicon (c-Si) solar cell with a CNT thin film to form a c-Si/CNT film solar cell. The c-Si/CNT solar cell had a high short-circuit current density of 35.5 mA cm^-2, which is higher than that using aluminum as the back electrode, indicating that CNTs can be used as hole transport materials in silicon-based solar cells. The power conversion efficiency of the c-Si/CNT solar cell was increased from 7.1% to 10.9% by dropping a few drops of a dilute HF solution (5 wt%) at the interface of the c-Si and the CNT film. This is because HF etches away the oxide layer on the c-Si surface, increases the interfacial contact area between the CNT film and the c-Si and decreases the recombination rate of electron/hole pairs.
- Solar cell,
- Carbon nanotubes,
- Heterojunction,
- Crystalline silicon

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References(20)

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