Spin-coated kesterite CZTS thin films for photovoltaic applications

L. Majula; N. R. Mlyuka; M. E. Samiji; Bryce Sydney Richards; D. Y. Kim; S. H. Kim; H. J. Lee; H. J. Choi

doi:10.3938/jkps.67.1078

Spin-coated kesterite CZTS thin films for photovoltaic applications

L. Majula^*, N. R. Mlyuka, M. E. Samiji, Bryce Sydney Richards, D. Y. Kim, S. H. Kim, H. J. Lee, H. J. Choi

^*Corresponding author for this work

School of Engineering & Physical Sciences

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

12 Citations (Scopus)

Abstract

Copper zinc tin-sulfide (CZTS) films have been widely studied over recent years due to the inherent advantages of low cost, high absorption coefficient (≥ 10<sup>4</sup> cm<sup>−1</sup>), suitable band gap (∼1.5 eV) and nontoxicity. In this work, spin coating was used to obtain CZTS films of various compositions and degrees of crystallization on glass substrates, which were then annealed at 500 °C in a N<inf>2</inf> atmosphere by using a rapid thermal processing (RTP) furnace in order to optimize their structure. Non-stoichiometric precursors and low spinning speeds resulted in a lower sheet resistance, which is considered to be a result of lower degree of crystallization. Furthermore, the non-stoichiometric films had a high optical band gap (> 1.66 eV) whereas the band gap of the stoichiometric films (1.4 to 1.6 eV) was close to the optimal value (1.5 eV) for solar-cell applications.

Original language	English
Pages (from-to)	1078-1081
Number of pages	4
Journal	Journal of the Korean Physical Society
Volume	67
Issue number	6
DOIs	https://doi.org/10.3938/jkps.67.1078
Publication status	Published - Sept 2015

Keywords

Copper zinc tin-sulfide (CZTS)
Photovoltaics
Rapid thermal processing
Spin coating
Thin film

ASJC Scopus subject areas

General Physics and Astronomy

UN SDGs

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

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title = "Spin-coated kesterite CZTS thin films for photovoltaic applications",

abstract = "Copper zinc tin-sulfide (CZTS) films have been widely studied over recent years due to the inherent advantages of low cost, high absorption coefficient (≥ 104 cm−1), suitable band gap (∼1.5 eV) and nontoxicity. In this work, spin coating was used to obtain CZTS films of various compositions and degrees of crystallization on glass substrates, which were then annealed at 500 °C in a N2 atmosphere by using a rapid thermal processing (RTP) furnace in order to optimize their structure. Non-stoichiometric precursors and low spinning speeds resulted in a lower sheet resistance, which is considered to be a result of lower degree of crystallization. Furthermore, the non-stoichiometric films had a high optical band gap (> 1.66 eV) whereas the band gap of the stoichiometric films (1.4 to 1.6 eV) was close to the optimal value (1.5 eV) for solar-cell applications.",

keywords = "Copper zinc tin-sulfide (CZTS), Photovoltaics, Rapid thermal processing, Spin coating, Thin film",

author = "L. Majula and Mlyuka, {N. R.} and Samiji, {M. E.} and Richards, {Bryce Sydney} and Kim, {D. Y.} and Kim, {S. H.} and Lee, {H. J.} and Choi, {H. J.}",

year = "2015",

month = sep,

doi = "10.3938/jkps.67.1078",

language = "English",

volume = "67",

pages = "1078--1081",

journal = "Journal of the Korean Physical Society",

issn = "0374-4884",

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TY - JOUR

T1 - Spin-coated kesterite CZTS thin films for photovoltaic applications

AU - Majula, L.

AU - Mlyuka, N. R.

AU - Samiji, M. E.

AU - Richards, Bryce Sydney

AU - Kim, D. Y.

AU - Kim, S. H.

AU - Lee, H. J.

AU - Choi, H. J.

PY - 2015/9

Y1 - 2015/9

N2 - Copper zinc tin-sulfide (CZTS) films have been widely studied over recent years due to the inherent advantages of low cost, high absorption coefficient (≥ 104 cm−1), suitable band gap (∼1.5 eV) and nontoxicity. In this work, spin coating was used to obtain CZTS films of various compositions and degrees of crystallization on glass substrates, which were then annealed at 500 °C in a N2 atmosphere by using a rapid thermal processing (RTP) furnace in order to optimize their structure. Non-stoichiometric precursors and low spinning speeds resulted in a lower sheet resistance, which is considered to be a result of lower degree of crystallization. Furthermore, the non-stoichiometric films had a high optical band gap (> 1.66 eV) whereas the band gap of the stoichiometric films (1.4 to 1.6 eV) was close to the optimal value (1.5 eV) for solar-cell applications.

AB - Copper zinc tin-sulfide (CZTS) films have been widely studied over recent years due to the inherent advantages of low cost, high absorption coefficient (≥ 104 cm−1), suitable band gap (∼1.5 eV) and nontoxicity. In this work, spin coating was used to obtain CZTS films of various compositions and degrees of crystallization on glass substrates, which were then annealed at 500 °C in a N2 atmosphere by using a rapid thermal processing (RTP) furnace in order to optimize their structure. Non-stoichiometric precursors and low spinning speeds resulted in a lower sheet resistance, which is considered to be a result of lower degree of crystallization. Furthermore, the non-stoichiometric films had a high optical band gap (> 1.66 eV) whereas the band gap of the stoichiometric films (1.4 to 1.6 eV) was close to the optimal value (1.5 eV) for solar-cell applications.

KW - Copper zinc tin-sulfide (CZTS)

KW - Photovoltaics

KW - Rapid thermal processing

KW - Spin coating

KW - Thin film

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U2 - 10.3938/jkps.67.1078

DO - 10.3938/jkps.67.1078

M3 - Article

AN - SCOPUS:84943177365

SN - 0374-4884

VL - 67

SP - 1078

EP - 1081

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 6

ER -

Spin-coated kesterite CZTS thin films for photovoltaic applications

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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