(AgxCu1 – x)2ZnSnS4-Based Thin Film Heterojunctions: Influence of CdS Deposition Method

Surface Engineering and Applied Electrochemistry - Tập 57 - Trang 323-329 - 2021
L. Dermenji1, N. Curmei1, G. Gurieva2, L. Bruc1
1Institute of Applied Physics, Chisinau, Moldova
2Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Abteilung Struktur und Dynamik von Energiematerialien, Berlin, Germany

Tóm tắt

Cu2ZnSnSe4 (CZTSe) based solar cells, containing abundant elements, with Ag alloying have recently reached efficiency of 10.2%. The open circuit voltage in CZTSe devices is believed to be limited, in between other factors, by strong band tailing caused by an exceptionally high density of Cu/Zn antisites. By replacing Cu in CZTSe with Ag, whose covalent radius is 15% larger than that of Cu and Zn, the density of I–II antisite defects (e.g., Cu–Zn disorder) is predicted to drop. In the present work, (AgxCu1 – x)2ZnSnS4 (ACZTS) heterostructures in three different architectures were investigated. The 5 and 10% silver substituted CZTS absorber layers were obtained by low-cost spray pyrolysis technique, as well as three different methods for the CdS layer deposition were tested in order to optimize the ACZTS heterostructure efficiency.

Tài liệu tham khảo

Todorov, T.K., Tang, J., Bag, S., Gunawan, O., et al., Beyond 11% efficiency: characteristics of state-of-the-art Cu2ZnSn(S,Se)4 solar cells, Adv. Energy Mater., 2012, vol. 3, p. 34. https://doi.org/10.1002/aenm.201200348 Wang, W., Winkler, M.T., Gunawan, O., Gokmen, T., et al., Device characteristics of CZTSSe thin-film solar cells with 12.6% efficiency, Adv. Energy Mater., 2013, vol. 4, art. ID 1301465. https://doi.org/10.1002/aenm.201301465 Gunawan, O., Gokmen, T., and Mitzi, D.B., Suns-V OC characteristics of high performance kesterite solar cells, J. Appl. Phys., 2014, vol. 116, art. ID 084504. https://doi.org/10.1063/1.4893315 Chagarov, E., Sardashti, K., Kummel, A.C., Lee, Y.S., et al., Ag2ZnSn(S,Se)4: A highly promising absorber for thin film photovoltaics, J. Chem. Phys., 2016, vol. 144, art. ID 104704. https://doi.org/10.1063/1.4943270 Huang, W.-C., Wei, S.-Y., Cai, C.-H., Ho, W.-H., and Lai, C.-H., The role of Ag in aqueous solution processed (Ag,Cu)2ZnSn(S,Se)4 kesterite solar cells: antisite defect elimination and importance of Na passivation, J. Mater. Chem. A, 2018, vol. 6, no. 31, p. 15170. https://doi.org/10.1039/c8ta02950d Gershon, T., Lee, Y.S., Antunez, P., Mankad, R., et al., Photovoltaic materials and devices based on the alloyed kesterite absorber (AgxCu1 – x)2ZnSnSe4, Adv. Energy Mater., 2016, vol. 6, no. 10, art. ID 1502468, https://doi.org/10.1002/aenm.201502468 Gershon, T., Sardashti, K., Gunawan, O., Mankad, R., et al., Photovoltaic device with over 5% efficiency based on an n-type Ag2ZnSnSe4 absorber, Adv. Energy Mater., 2016, vol. 6, no. 22, art. ID 1601182. https://doi.org/10.1002/aenm.201601182 Qi, Y.-F., Kou, D.-X., Zhou, W.-H., Zhou, Z.-J., et al., Engineering of interface band bending and defects elimination via a Ag-graded active layer for efficient (Cu,Ag)2ZnSn(S,Se)4 solar cells, Energy Environ. Sci., 2017, vol. 10, p. 2401. https://doi.org/10.1039/C7EE01405H Nguyen, T.H., Kawaguchi, T., Chantana, J., Minemoto, T., et al., Structural and solar cell properties of a Ag-containing Cu2ZnSnS4 thin film derived from spray pyrolysis, ACS Appl. Mater. Interfaces, 2018, vol. 10, p. 5455. https://doi.org/10.1021/acsami.7b14929 Sayed, M.H., Schoneberg, J., Parisi, J., and Gütay, L., Influence of silver incorporation on CZTSSe solar cells grown by spray pyrolysis, Mater. Sci. Semicond. Process., 2018, vol. 76, p. 31. https://doi.org/10.1016/j.mssp.2017.12.007 Dermenji, L., Guc, M., Gurieva, G., Dittrich, Th., et al., Thin films of (AgxCu1 − x)2ZnSn(S,Se)4 (x = 0.05–0.20) prepared by spray pyrolysis, Thin Solid Films, 2019, vol. 690, art. ID 137532. https://doi.org/10.1016/j.tsf.2019.137532 Dey, Ma., Das, N.K., Sen Gupta, A.K., Dey, Mr., et al., Deposition of CdS thin film by thermal evaporation, Proc. 2019 Int. Conf. on Electrical, Computer and Communication Engineering (ECCE), February 7–9, 2019, Red Hook, NY: Curran Assoc., 2019. Memarian, N., Rozati, S.M., Concina, I., and Vomiero, A., Deposition of nanostructured CdS thin films by thermal evaporation method: Effect of substrate temperature, Materials, 2017, vol. 10, no. 7, p. 773. https://doi.org/10.3390/ma10070773 Jassim, S.A.-J., Zumaila, A.A.R.A., and Al Waly, G.A.A., Influence of substrate temperature on the structural, optical and electrical properties of CdS thin films deposited by thermal evaporation, Results Phys., 2013, vol. 3, p. 173. https://doi.org/10.1016/j.rinp.2013.08.003 Kamal, T., Parvez, S., Khabir, K.M., Matin, R., et al., Chemical bath deposition of CdS layer for thin film solar cell, S. Asian J. Res. Eng. Sci. Technol., 2019, vol. 4, no. 1, p. 27. Tec-Yam, S., Patino, R., and Oliva, A.I., Chemical bath deposition of CdS films on different substrate orientations, Curr. Appl. Phys., 2011, vol. 11, no. 3, p. 914. https://doi.org/10.1016/j.cap.2010.12.016 Tanushevski, A. and Osmani, H., CdS thin films obtained by chemical bath deposition in presence of fluorine and the effect of annealing on their properties, Chalcogenide Lett., 2018, vol. 15, no. 2, p. 107. Ouafi, M., Jaber, B., Atourki, L., Zayyoun, N., et al., In situ low-temperature chemical bath deposition of CdS thin films without thickness limitation: structural and optical properties, Int. J. Photoenergy, 2018, vol. 2018, art. ID 4549154. https://doi.org/10.1155/2018/4549154 Shaban, M., Mustafa, M., and El Sayed, A.M., Structural, optical, and photocatalytic properties of the spray deposited nanoporous CdS thin films; influence of copper doping, annealing, and deposition parameters, Mater. Sci. Semicond. Process., 2016, vol. 56, p. 329. https://doi.org/10.1016/j.mssp.2016.09.006 Ashok, C.H., Venkateswara Rao, K., Shilpa Chakra, C.H., Rajendar, V., et al., Fabrication and characterization of CdS thin films for the solar cell applications, Int. J. ChemTech Res., 2014, vol. 6, no. 6, p. 3367. Hasnat, A. and Podder, J., Effect of annealing temperature on structural, optical and electrical properties of pure CdS thin films deposited by spray pyrolysis technique, Adv. Mater. Phys. Chem., 2012, vol. 2, no. 4, art. ID 26003. https://doi.org/10.4236/ampc.2012.24034 Öztas, M. and Bedir, M., Thickness dependence of structural, electrical and optical properties of sprayed ZnO:Cu films, Thin Solid Films, 2008, vol. 516, no. 8, p. 1703. https://doi.org/10.1016/j.tsf.2007.05.018