Radial heterojunctions are known to exhibit magnificent anti-reflectivity and enhanced carrier collectivity due to short carrier diffusion distances. In this work, silicon nanowire-poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) radial heterojunction solar cells are presented. Both layers of the heterojunction are fabricated using simple and cost-effective methods. Radial heterojunctions showed remarkable improvements in solar cell characteristics compared to planar heterojunctions, fabricated under the same conditions. The highest solar cell efficiency of 5.30% is obtained. The cells exhibit external quantum efficiency of 77% at 500 nm wavelength and harvest light over the entire 300-1200 nm spectral bandwidth. The effect of nanowire length on device performance is also determined.
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12 September 2011
Research Article|
September 14 2011
Silicon nanowire - poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) heterojunction solar cells
Baris Ozdemir;
Baris Ozdemir
1Department of Metallurgical and Materials Engineering,
Middle East Technical University
, Ankara, Turkey
2Center for Solar Energy Research and Applications,
Middle East Technical University
, Ankara, Turkey
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Mustafa Kulakci;
Mustafa Kulakci
2Center for Solar Energy Research and Applications,
Middle East Technical University
, Ankara, Turkey
3Department of Physics,
Middle East Technical University
, Ankara, Turkey
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Rasit Turan;
Rasit Turan
2Center for Solar Energy Research and Applications,
Middle East Technical University
, Ankara, Turkey
3Department of Physics,
Middle East Technical University
, Ankara, Turkey
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Husnu Emrah Unalan
1Department of Metallurgical and Materials Engineering,
Middle East Technical University
, Ankara, Turkey
2Center for Solar Energy Research and Applications,
Middle East Technical University
, Ankara, Turkey
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
Appl. Phys. Lett. 99, 113510 (2011)
Article history
Received:
April 13 2011
Accepted:
August 20 2011
Citation
Baris Ozdemir, Mustafa Kulakci, Rasit Turan, Husnu Emrah Unalan; Silicon nanowire - poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) heterojunction solar cells. Appl. Phys. Lett. 12 September 2011; 99 (11): 113510. https://doi.org/10.1063/1.3636385
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