Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy

Le Quang Phuong; Makoto Okano; Yasuhiro Yamada; Akira Nagaoka; Kenji Yoshino; Yoshihiko Kanemitsu

doi:10.1109/PVSC.2015.7356088

Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy

Le Quang Phuong, Makoto Okano, Yasuhiro Yamada, Akira Nagaoka, Kenji Yoshino, Yoshihiko Kanemitsu

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We have studied photocarrier recombination and relaxation dynamics in Cu2ZnSnS4 (CZTS) single crystals using a combination of various optical time-resolved spectroscopy. The band tails and deep defects govern primarily the photocarrier dynamics in CZTS. We pointed out the physical origins behind low power conversion efficiencies of CZTS-based solar cells. In addition, we found that the photocarrier lifetime increases as Na is doped in CZTS; this result implies that Na doping suppresses a part of nonradiative recombination centers in CZTS. Therefore, Na dopant is important to improve the photovoltaic performance of CZTS-based solar cells.

Original language	English
Title of host publication	2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)	9781479979448
DOIs	https://doi.org/10.1109/PVSC.2015.7356088
Publication status	Published - 2015 Dec 14
Externally published	Yes
Event	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States Duration: 2015 Jun 14 → 2015 Jun 19

Other

Other	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Country/Territory	United States
City	New Orleans
Period	15/6/14 → 15/6/19

Keywords

Cu2ZnSnS4
photocarrier dynamics
sodium doping
solar cells
time-resolved spectroscopy

ASJC Scopus subject areas

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

UN SDGs

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

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10.1109/PVSC.2015.7356088

Cite this

Phuong, L. Q., Okano, M., Yamada, Y., Nagaoka, A., Yoshino, K., & Kanemitsu, Y. (2015). Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 [7356088] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2015.7356088

Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy. / Phuong, Le Quang; Okano, Makoto; Yamada, Yasuhiro et al.

2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7356088.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Phuong, LQ, Okano, M, Yamada, Y, Nagaoka, A, Yoshino, K & Kanemitsu, Y 2015, Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy. in 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015., 7356088, Institute of Electrical and Electronics Engineers Inc., 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015, New Orleans, United States, 15/6/14. https://doi.org/10.1109/PVSC.2015.7356088

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title = "Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy",

abstract = "We have studied photocarrier recombination and relaxation dynamics in Cu2ZnSnS4 (CZTS) single crystals using a combination of various optical time-resolved spectroscopy. The band tails and deep defects govern primarily the photocarrier dynamics in CZTS. We pointed out the physical origins behind low power conversion efficiencies of CZTS-based solar cells. In addition, we found that the photocarrier lifetime increases as Na is doped in CZTS; this result implies that Na doping suppresses a part of nonradiative recombination centers in CZTS. Therefore, Na dopant is important to improve the photovoltaic performance of CZTS-based solar cells.",

keywords = "Cu2ZnSnS4, photocarrier dynamics, sodium doping, solar cells, time-resolved spectroscopy",

author = "Phuong, {Le Quang} and Makoto Okano and Yasuhiro Yamada and Akira Nagaoka and Kenji Yoshino and Yoshihiko Kanemitsu",

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AU - Phuong, Le Quang

AU - Okano, Makoto

AU - Yamada, Yasuhiro

AU - Nagaoka, Akira

AU - Yoshino, Kenji

AU - Kanemitsu, Yoshihiko

PY - 2015/12/14

Y1 - 2015/12/14

N2 - We have studied photocarrier recombination and relaxation dynamics in Cu2ZnSnS4 (CZTS) single crystals using a combination of various optical time-resolved spectroscopy. The band tails and deep defects govern primarily the photocarrier dynamics in CZTS. We pointed out the physical origins behind low power conversion efficiencies of CZTS-based solar cells. In addition, we found that the photocarrier lifetime increases as Na is doped in CZTS; this result implies that Na doping suppresses a part of nonradiative recombination centers in CZTS. Therefore, Na dopant is important to improve the photovoltaic performance of CZTS-based solar cells.

AB - We have studied photocarrier recombination and relaxation dynamics in Cu2ZnSnS4 (CZTS) single crystals using a combination of various optical time-resolved spectroscopy. The band tails and deep defects govern primarily the photocarrier dynamics in CZTS. We pointed out the physical origins behind low power conversion efficiencies of CZTS-based solar cells. In addition, we found that the photocarrier lifetime increases as Na is doped in CZTS; this result implies that Na doping suppresses a part of nonradiative recombination centers in CZTS. Therefore, Na dopant is important to improve the photovoltaic performance of CZTS-based solar cells.

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KW - photocarrier dynamics

KW - sodium doping

KW - solar cells

KW - time-resolved spectroscopy

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Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy

Abstract

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Keywords

ASJC Scopus subject areas

UN SDGs

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