Effect of band offset on the open circuit voltage of heterojunction CuIn1-xGaxSe2 solar cells

Akimasa Yamada; Koji Matsubara; Keiichiro Sakurai; Shogo Ishizuka; Hitoshi Tampo; Paul J. Fons; Kakuya Iwata; Shigeru Niki

doi:10.1063/1.1831566

Effect of band offset on the open circuit voltage of heterojunction CuIn_1-xGa_xSe₂ solar cells

Akimasa Yamada, Koji Matsubara, Keiichiro Sakurai, Shogo Ishizuka, Hitoshi Tampo, Paul J. Fons, Kakuya Iwata, Shigeru Niki

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The reasons behind why the theoretically estimated open circuit voltage (V_oc) of CuIn_1-xGa_xSe₂ solar cells with large x values has not been realized are discussed. Typically, the reduction in V_oc is estimated only on the basis of the conduction-band offset between the absorber and the window material. The importance of the electron affinity difference between the window and the transparent electrode must also be taken into account. Based upon both of these factors, a material selection guideline is reported for the window and the transparent electrode layers suitable for high-x CuIn_1-xGa _xSe₂ absorber-based solar cells.

Original language	English
Pages (from-to)	5607-5609
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	23
DOIs	https://doi.org/10.1063/1.1831566
Publication status	Published - 2004 Dec 6
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.1831566

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title = "Effect of band offset on the open circuit voltage of heterojunction CuIn1-xGaxSe2 solar cells",

abstract = "The reasons behind why the theoretically estimated open circuit voltage (Voc) of CuIn1-xGaxSe2 solar cells with large x values has not been realized are discussed. Typically, the reduction in Voc is estimated only on the basis of the conduction-band offset between the absorber and the window material. The importance of the electron affinity difference between the window and the transparent electrode must also be taken into account. Based upon both of these factors, a material selection guideline is reported for the window and the transparent electrode layers suitable for high-x CuIn1-xGa xSe2 absorber-based solar cells.",

author = "Akimasa Yamada and Koji Matsubara and Keiichiro Sakurai and Shogo Ishizuka and Hitoshi Tampo and Fons, {Paul J.} and Kakuya Iwata and Shigeru Niki",

note = "Funding Information: This work was supported in part by the New Energy and Industrial Technology Development Organization (NEDO).",

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T1 - Effect of band offset on the open circuit voltage of heterojunction CuIn1-xGaxSe2 solar cells

AU - Yamada, Akimasa

AU - Matsubara, Koji

AU - Sakurai, Keiichiro

AU - Ishizuka, Shogo

AU - Tampo, Hitoshi

AU - Fons, Paul J.

AU - Iwata, Kakuya

AU - Niki, Shigeru

N1 - Funding Information: This work was supported in part by the New Energy and Industrial Technology Development Organization (NEDO).

PY - 2004/12/6

Y1 - 2004/12/6

N2 - The reasons behind why the theoretically estimated open circuit voltage (Voc) of CuIn1-xGaxSe2 solar cells with large x values has not been realized are discussed. Typically, the reduction in Voc is estimated only on the basis of the conduction-band offset between the absorber and the window material. The importance of the electron affinity difference between the window and the transparent electrode must also be taken into account. Based upon both of these factors, a material selection guideline is reported for the window and the transparent electrode layers suitable for high-x CuIn1-xGa xSe2 absorber-based solar cells.

AB - The reasons behind why the theoretically estimated open circuit voltage (Voc) of CuIn1-xGaxSe2 solar cells with large x values has not been realized are discussed. Typically, the reduction in Voc is estimated only on the basis of the conduction-band offset between the absorber and the window material. The importance of the electron affinity difference between the window and the transparent electrode must also be taken into account. Based upon both of these factors, a material selection guideline is reported for the window and the transparent electrode layers suitable for high-x CuIn1-xGa xSe2 absorber-based solar cells.

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Effect of band offset on the open circuit voltage of heterojunction CuIn_1-xGa_xSe₂ solar cells

Abstract

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