Fabrication of Cu2ZnSnSe4 solar cells through multi-step selenization of layered metallic precursor film

Chen, Wei Chao; Tunuguntla, Venkatesh; Li, Hsien Wen; Chen, Cheng Ying; Li, Shao Sian; Hwang, Jenn-Shyong; Lee, Chin Hao; Chen, Li‐Chyong; Chen, Kuei‐Hsien

doi:10.1016/j.tsf.2016.03.021

Cited by 10 publications

(8 citation statements)

References 19 publications

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“…25-1288). Along with these two phases, the characteristic peaks of Sn were also found at 30.71°, 32.10°, 43.95°, and The 600 nm thick Sn/Zn/Cu (CZT) multimetallic stacked precursors were sputteringdeposited on our Mo-SLGs with or without MoO 3 layers [11,35]. The X-ray diffraction (XRD) of metal stacked precursors on Mo-SLGs (in Figure 2) showed two characteristic peaks of well-intermixed metal alloys at 30.26 • , corresponding to bronze (Cu 6 Sn 5 JCPDS no.…”

Section: Resultsmentioning

confidence: 89%

“…Moreover, the ultrathin MoO3 layers can be prepared by the reactive sputtering of 1 μm thick Mo on SLGs, which is compatible with the subsequent fabrication for CIGSSe solar cells [34]. The 600 nm thick Sn/Zn/Cu (CZT) multimetallic stacked precursors were sputteringdeposited on our Mo-SLGs with or without MoO3 layers [11,35]. The X-ray diffraction (XRD) of metal stacked precursors on Mo-SLGs (in Figure 2) showed two characteristic peaks of well-intermixed metal alloys at 30.26°, corresponding to bronze (Cu6Sn5 JCPDS no.…”

Section: Resultsmentioning

confidence: 99%

“…650296). The well-intermixed precursors are beneficial to the CZTSSe growth during sulfoselenization [11,35].…”

Section: Resultsmentioning

confidence: 99%

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Back Contact Engineering to Improve CZTSSe Solar Cell Performance by Inserting MoO3 Sacrificial Nanolayers

et al. 2022

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Earth-abundant Cu2ZnSn(S,Se)4 (CZTSSe) is a promising nontoxic alternative compound for commercially available Cu(In,Ga)(S,Se)2 thin-film solar cells. In this study, a MoO3 nanolayer was applied as a sacrificial layer to optimize the quality of the interface between the CZTSSe and Mo back contact. MoO3 nanolayers can greatly improve CZTSSe grain growth and suppress the formation of some harmful secondary phases, especially the undesirable MoS(e)2. In terms of device performance, the series resistance was reduced from 1.83 to 1.54 Ω·cm2, and the fill factor was significantly enhanced from 42.67% to 52.12%. Additionally, MoO3 nanolayers improved CZTSSe absorber quality by lowering the defect energy levels from 228 to 148 meV. Furthermore, first-principles calculations demonstrate that the partial sulfoselenized MoO3 nanolayers may function as the (p-type) hole-selective contacts at Mo/CZTSSe interfaces, leading to an overall improvement in device performance. Lastly, a CZTSSe solar cell with about 26% improvement (compared with reference cells) in power conversion efficiency was achieved by inserting 5 nm MoO3 sacrificial layers.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

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Back Contact Engineering to Improve CZTSSe Solar Cell Performance by Inserting MoO3 Sacrificial Nanolayers

et al. 2022

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“…During the process, the chamber was filled with Ar gas and the vacuum was maintained at 1.07 Pa. A CZTSSe absorption layer was formed using the metallic precursors and a rapid thermal annealing process. These metallic precursors were slowly heated in a graphite box and maintained at 300 °C for 10 min to form a well-intermixed metal alloy . After that, it was cooled at room temperature and quickly heated to 520 °C for 10 min with 50 mg of Se and 2 mg of S powders.…”

Section: Methodsmentioning

confidence: 99%

“…These metallic precursors were slowly heated in a graphite box and maintained at 300 °C for 10 min to form a well-intermixed metal alloy. 30 After that, it was cooled at room temperature and quickly heated to 520 °C for 10 min with 50 mg of Se and 2 mg of S powders. To eliminate secondary phases, the CZTSSe thin films were immersed in 0.05 M aqueous KCN solution for 5 min and washed with deionized water.…”

Section: Methodsmentioning

confidence: 99%

Flexible High-Efficiency CZTSSe Solar Cells on Diverse Flexible Substrates via an Adhesive-Bonding Transfer Method

Min

Jeong

Kim

et al. 2020

ACS Appl. Mater. Interfaces

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Cu2ZnSn(S,Se)4 (CZTSSe) thin-film solar cells are showing great promise due to using earth-abundant and nontoxic materials and tuning the band gap through the amount of S and Se. Flexible high-efficiency CZTSSe solar cells are one of the outstanding research challenges because they currently require the use of thick glass substrates due to the high-temperature heat treatment process, and for this reason, few flexible CZTSSe solar cells have been reported. Furthermore, most researchers have used thin glass and metal substrates with little flexibility; the power conversion efficiency (PCE or η) values of the solar cells made with them have been slightly lower. To overcome these hurdles, we transferred high-efficiency CZTSSe solar cells formed on a soda-lime glass substrate to flexible substrates via an adhesive-bonding transfer method. Through this method, we were able to achieve the PCE of 5.8–7.1% on completely flexible substrates such as cloth, paper, and poly(ethylene terephthalate) (PET). In particular, we were able to produce a CZTSSe solar cell on a PET substrate with a PCE of 7.1%, which is the highest among fully flexible CZTSSe solar cells currently known to us. In addition, we deeply analyzed the PCE degradation of the flexible CZTSSe solar cell fabricated by the transfer method through a panoramic focused ion-beam image and nanoindentation. From the results of our work, we provide an insight into the possibility of making flexible high-efficiency CZTSSe solar cells using our transfer method.

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Effect of selenization temperature on the formation of CZTSe absorber layer

Kumar

Singh

2019

Appl. Phys. A

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Fabrication of Cu2ZnSnSe4 solar cells through multi-step selenization of layered metallic precursor film

Cited by 10 publications

References 19 publications

Back Contact Engineering to Improve CZTSSe Solar Cell Performance by Inserting MoO3 Sacrificial Nanolayers

Back Contact Engineering to Improve CZTSSe Solar Cell Performance by Inserting MoO3 Sacrificial Nanolayers

Flexible High-Efficiency CZTSSe Solar Cells on Diverse Flexible Substrates via an Adhesive-Bonding Transfer Method

Effect of selenization temperature on the formation of CZTSe absorber layer

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