Local current transport and surface potential of photovoltaic Cu(In, Ga)Se2 thin films probed by multi-scale imaging methods

A. R. Jeong; G. Y. Kim; W. Jo; D. H. Nam; H. Cheong; H. J. Jo; D. H. Kim; S. J. Sung; J. K. Kang; D. H. Lee

doi:10.1088/2043-6262/4/1/015007

Local current transport and surface potential of photovoltaic Cu(In, Ga)Se2 thin films probed by multi-scale imaging methods

A. R. Jeong, G. Y. Kim, W. Jo, D. H. Nam, H. Cheong, H. J. Jo, D. H. Kim, S. J. Sung, J. K. Kang, D. H. Lee

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

15 Scopus citations

Abstract

Microstructural alteration induces non-uniform device characteristics in polycrystalline thin films. In thin-film solar cells based on Cu(In Ga)Se2 (CIGS), local electrical properties are investigated by Raman scattering spectroscopic imaging and scanning probe microscopic tools. Localized and uneven intensity of phonon modes, which represent different orientation and phases, elucidate the nature of non-uniformity of crystallinity, composition and defects in the films. Surface potential mapping at nanoscale is performed by Kelvin probe force microscopy, showing ~40mV of band-bending at the grain boundaries. Externally biased-current mapping, which is obtained by conductive atomic force microscopy, shows preferred current path in the films.

Original language	English
Article number	015007
Journal	Advances in Natural Sciences: Nanoscience and Nanotechnology
Volume	4
Issue number	1
DOIs	https://doi.org/10.1088/2043-6262/4/1/015007
State	Published - Mar 2013

Keywords

Atomic force
Cu(In Ga)Se2
Solar cells
Surface current and potential
Thin-films

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1088/2043-6262/4/1/015007

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Jeong, A. R., Kim, G. Y., Jo, W., Nam, D. H., Cheong, H., Jo, H. J., Kim, D. H., Sung, S. J., Kang, J. K., & Lee, D. H. (2013). Local current transport and surface potential of photovoltaic Cu(In, Ga)Se2 thin films probed by multi-scale imaging methods. Advances in Natural Sciences: Nanoscience and Nanotechnology, 4(1), Article 015007. https://doi.org/10.1088/2043-6262/4/1/015007

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title = "Local current transport and surface potential of photovoltaic Cu(In, Ga)Se2 thin films probed by multi-scale imaging methods",

abstract = "Microstructural alteration induces non-uniform device characteristics in polycrystalline thin films. In thin-film solar cells based on Cu(In Ga)Se2 (CIGS), local electrical properties are investigated by Raman scattering spectroscopic imaging and scanning probe microscopic tools. Localized and uneven intensity of phonon modes, which represent different orientation and phases, elucidate the nature of non-uniformity of crystallinity, composition and defects in the films. Surface potential mapping at nanoscale is performed by Kelvin probe force microscopy, showing ~40mV of band-bending at the grain boundaries. Externally biased-current mapping, which is obtained by conductive atomic force microscopy, shows preferred current path in the films.",

keywords = "Atomic force, Cu(In Ga)Se2, Solar cells, Surface current and potential, Thin-films",

author = "Jeong, {A. R.} and Kim, {G. Y.} and W. Jo and Nam, {D. H.} and H. Cheong and Jo, {H. J.} and Kim, {D. H.} and Sung, {S. J.} and Kang, {J. K.} and Lee, {D. H.}",

year = "2013",

month = mar,

doi = "10.1088/2043-6262/4/1/015007",

language = "English",

volume = "4",

journal = "Advances in Natural Sciences: Nanoscience and Nanotechnology",

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TY - JOUR

T1 - Local current transport and surface potential of photovoltaic Cu(In, Ga)Se2 thin films probed by multi-scale imaging methods

AU - Jeong, A. R.

AU - Kim, G. Y.

AU - Jo, W.

AU - Nam, D. H.

AU - Cheong, H.

AU - Jo, H. J.

AU - Kim, D. H.

AU - Sung, S. J.

AU - Kang, J. K.

AU - Lee, D. H.

PY - 2013/3

Y1 - 2013/3

N2 - Microstructural alteration induces non-uniform device characteristics in polycrystalline thin films. In thin-film solar cells based on Cu(In Ga)Se2 (CIGS), local electrical properties are investigated by Raman scattering spectroscopic imaging and scanning probe microscopic tools. Localized and uneven intensity of phonon modes, which represent different orientation and phases, elucidate the nature of non-uniformity of crystallinity, composition and defects in the films. Surface potential mapping at nanoscale is performed by Kelvin probe force microscopy, showing ~40mV of band-bending at the grain boundaries. Externally biased-current mapping, which is obtained by conductive atomic force microscopy, shows preferred current path in the films.

AB - Microstructural alteration induces non-uniform device characteristics in polycrystalline thin films. In thin-film solar cells based on Cu(In Ga)Se2 (CIGS), local electrical properties are investigated by Raman scattering spectroscopic imaging and scanning probe microscopic tools. Localized and uneven intensity of phonon modes, which represent different orientation and phases, elucidate the nature of non-uniformity of crystallinity, composition and defects in the films. Surface potential mapping at nanoscale is performed by Kelvin probe force microscopy, showing ~40mV of band-bending at the grain boundaries. Externally biased-current mapping, which is obtained by conductive atomic force microscopy, shows preferred current path in the films.

KW - Atomic force

KW - Cu(In Ga)Se2

KW - Solar cells

KW - Surface current and potential

KW - Thin-films

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U2 - 10.1088/2043-6262/4/1/015007

DO - 10.1088/2043-6262/4/1/015007

M3 - Article

AN - SCOPUS:84889091676

SN - 2043-6262

VL - 4

JO - Advances in Natural Sciences: Nanoscience and Nanotechnology

JF - Advances in Natural Sciences: Nanoscience and Nanotechnology

IS - 1

M1 - 015007

ER -

Local current transport and surface potential of photovoltaic Cu(In, Ga)Se2 thin films probed by multi-scale imaging methods

Abstract

Keywords

UN SDGs

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