Steep sulfur gradient in CZTSSe solar cells by H<sub>2</sub>S-assisted rapid surface sulfurization

Taskesen, Teoman; Pareek, Devendra; Hauschild, Dirk; Haertel, Alan; Weinhardt, L.; Yang, Wanli; Pfeiffelmann, Timo; Nowak, David; Heske, Clemens; Gütay, Levent

doi:10.1039/d1ra00494h

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…The graph (Figure 6) shows that changes in the composition of S/(S þ Se) cause variations in V OC and J SC value. [34,35] It also explicitly demonstrates that when the V OC is strong, the J SC value decreases. The graph depicts the decrease in efficiency as the CZTS x Se 1Àx proportion approaches the CZTSe proportion, i.e., when x ≃ 0.8.…”

Section: Optimization Of Compositional Ratio Of Cztssementioning

confidence: 94%

Boosting the Efficiency of Kesterite Solar Cell: Use of Ag Mixed Cu₂ZnSnS₄Intermediate Thin Film Layer

Routray

2022

Physica Status Solidi (a)

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Photovoltaic (PV) technology is one of the direct means of exploiting the sun's energy into the useable energy. [1,2] In recent days, kesterite-based thin film solar cells such as CZTS, CZTSe, CZTSSe, etc. have emerged as promising PV materials due to their low cost, high absorption coefficientsð> 10 4 cm À1 Þ, and direct and tunable bandgap properties. [3][4][5] Generally, CdS, ZnS, and CdZnS are used as buffer layer with kesterite absorber layer. However, combination of CdS/kesterite absorber layer is very popular to reduce carrier recombination and enhance the performance of solar cell. [6] There are number of reports published over the years to enhance the efficiency of kesterite solar cell. [7] Recently, Et-taya et al. reported highest efficiency of 23.16% with CdS/CZTSSe solar cell. [8] According to solar cell efficiency tables (version 55), the notable power conversion efficiency (PEC) of fabricated CZTS reaches up to 11.0% and 12.6% for CZTSSe solar cell. [9] However, bulk defects, secondary phase formation, and grain boundaries of kesterite materials are the measure parameters for low power conversion efficiency (PCE) and open-circuit voltage (V OC ). [10,11] To increase the performance, the thin film kesterite solar cell has to overcome the rollover effect (crossing the dark and illuminated I-V curve) due to both bulk defects and a back contact (BC) barrier. [12] Hence, to overcome drawback of barrier, grain boundaries, and recombination rate in CZTS, superlattice structure of ACZTS layer is proposed to enhance the PCE and open-circuit voltage (V OC ) up to remarkable level. [13,14] It is reported that doping (Ag) with (Cu) reduces I-II antisite defect, band tailing, and enlarges grain boundaries for kesterite solar cell which improve performance of the device. [15,16] Furthermore, the layout of Uday Saha et al. is investigated and analyzed on silver (Ag) mixed CZTS/CZTSe (active layer) and CZTS/CZTSe (back surface field [BSF] layer) which plays a significant role in improving the performance of singlejunction solar cells. [17,18] Moreover, their research primarily confined to CZTS/CZTSe material. As CZTSSe material allows more flexibility in tuning parameters and achieving highperformance enhancement, it is vital to examine the performance of CZTSSe and ACZTS/CZTSSe configuration.In this article, four different kesterite solar cell structures are simulated, analyzed, and compared. Analysis of Mo/CZTS/CdS/ ZnO/AZO (structure I) thin film primary kesterite solar cell structure is carried out to explore the performance degrading parameters of PCE and open-circuit voltage. Furthermore, another interesting and attractive absorber material CZTSSe is also explored and compared with structure I. The kesterite material CZTSSe has optical absorption coefficient 10 4 cm À1 , which is efficient enough to achieve high quantum efficiency (QE). The analysis of Mo/CZTSSe/CdS/ZnO/AZO (structure III) with different composition ratio of CZTSSe is varied, optimized, and compared with structure I. To improve their carrier ...

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Section: Optimization Of Compositional Ratio Of Cztssementioning

confidence: 94%

Boosting the Efficiency of Kesterite Solar Cell: Use of Ag Mixed Cu₂ZnSnS₄Intermediate Thin Film Layer

Routray

2022

Physica Status Solidi (a)

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“…11e). 275 This method was capable of improving the precise control of the diffusion depth of S into the CZTSe film. Although the back S grading can be successfully created in the CZTSSe layer, it tends to be accompanied by the Zn(S,Se) phases segregation near the back contact, suffering from high series resistance.…”

Section: Revisiting the Composition Engineering In Cztssementioning

confidence: 99%

mentioning

confidence: 99%

A critical review on rational composition engineering in kesterite photovoltaic devices: self-regulation and mutual synergy

Guo

2023

J. Mater. Chem. A

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Enhancement in photovoltaic performance of CZTS Thin-film solar cells through varying stacking order and sulfurization time

Olğar

2022

J Mater Sci: Mater Electron

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Steep sulfur gradient in CZTSSe solar cells by H₂S-assisted rapid surface sulfurization

Abstract: This article demonstrates a flash-type kinetic sulfurization method to introduce band-gap grading in CZTSe based photovoltaic devices. The developed approach allows to achieve a steep grading profile on kesterite thin-film surface.

Cited by 8 publications

References 31 publications

Boosting the Efficiency of Kesterite Solar Cell: Use of Ag Mixed Cu₂ZnSnS₄Intermediate Thin Film Layer

Boosting the Efficiency of Kesterite Solar Cell: Use of Ag Mixed Cu₂ZnSnS₄Intermediate Thin Film Layer

A critical review on rational composition engineering in kesterite photovoltaic devices: self-regulation and mutual synergy

Enhancement in photovoltaic performance of CZTS Thin-film solar cells through varying stacking order and sulfurization time

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Steep sulfur gradient in CZTSSe solar cells by H2S-assisted rapid surface sulfurization

Abstract: This article demonstrates a flash-type kinetic sulfurization method to introduce band-gap grading in CZTSe based photovoltaic devices. The developed approach allows to achieve a steep grading profile on kesterite thin-film surface.

Cited by 8 publications

References 31 publications

Boosting the Efficiency of Kesterite Solar Cell: Use of Ag Mixed Cu2ZnSnS4Intermediate Thin Film Layer

Boosting the Efficiency of Kesterite Solar Cell: Use of Ag Mixed Cu2ZnSnS4Intermediate Thin Film Layer

A critical review on rational composition engineering in kesterite photovoltaic devices: self-regulation and mutual synergy

Enhancement in photovoltaic performance of CZTS Thin-film solar cells through varying stacking order and sulfurization time

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Steep sulfur gradient in CZTSSe solar cells by H₂S-assisted rapid surface sulfurization

Boosting the Efficiency of Kesterite Solar Cell: Use of Ag Mixed Cu₂ZnSnS₄Intermediate Thin Film Layer

Boosting the Efficiency of Kesterite Solar Cell: Use of Ag Mixed Cu₂ZnSnS₄Intermediate Thin Film Layer