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Title: | Insulator Materials for Interface Passivation of Cu(In,Ga)Se-2 Thin Films | Authors: | Cunha, J. M. V. Fernandes, P. A. Hultqvist, A. Teixeira, J. P. Bose, S. VERMANG, Bart Garud, S. BULDU KOHL, Dilara Gaspar, J. Edoff, M. Leitao, J. P. Salome, P. M. P. |
Issue Date: | 2018 | Publisher: | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Source: | IEEE JOURNAL OF PHOTOVOLTAICS, 8(5), p. 1313-1319 | Abstract: | In this work, metal-insulator-semiconductor structures were fabricated in order to study different types of insulators, namely, aluminum oxide (Al2O3), silicon nitride, and silicon oxide (SiOx) to be used as passivation layers in Cu(In,Ga)Se-2 (CIGS) thin-film solar cells. The investigated stacks consisted of SLG/Mo/CIGS/insulator/Al. Raman scattering and photoluminescence measurements were done to verify the insulator deposition influence on the CIGS surface. In order to study the electrical properties of the CIGS-insulator interface, capacitance versus conductance and voltage (C-G-V) measurements were done to estimate the number and polarity of fixed insulator charges (Q(f)). The density of interface defects (D-it) was estimated from capacitance versus conductance and frequency (C-G-f) measurements. This study evidences that the deposition of the insulators at high temperatures (300 degrees C) and the use of a sputtering technique cause surface modification on the CIGS surface. We found that, by varying the SiOx deposition parameters, it is possible to have opposite charges inside the insulator, which would allow its use in different device architectures. The material with lower Dit values was Al2O3 when deposited by sputtering. | Notes: | [Cunha, J. M. V.; Fernandes, P. A.; Bose, S.; Gaspar, J.; Salome, P. M. P.] Int Iberian Nanotechnol Lab, P-4715330 Braga, Portugal. [Fernandes, P. A.] Inst Politecn Porto, Inst Super Engn Porto, Dept Fis, CIETI, P-4200072 Porto, Portugal. [Fernandes, P. A.; Teixeira, J. P.; Leitao, J. P.] Univ Aveiro, I3N, P-3810193 Aveiro, Portugal. [Hultqvist, A.; Bose, S.; Edoff, M.] Uppsala Univ, Angstrom Lab, Solid State Elect, Angstrom Solar Ctr, SE-75121 Uppsala, Sweden. [Teixeira, J. P.; Leitao, J. P.; Salome, P. M. P.] Univ Aveiro, Dept Fis, P-3810193 Aveiro, Portugal. [Vermang, B.; Garud, S.; Buldu, D.] Univ Hasselt Partner Solliance, B-3590 Diepenbeek, Belgium. [Vermang, B.; Garud, S.; Buldu, D.] IMEC Partner Solliance, B-3001 Leuven, Belgium. [Vermang, B.; Garud, S.; Buldu, D.] IMOMEC Partner Solliance, B-3590 Diepenbeek, Belgium. | Keywords: | Chemical passivation;Cu(In;Ga)Se-2 (CIGS);field-effect passivation;interface;passivation;solar cells;thin films | Document URI: | http://hdl.handle.net/1942/28468 | ISSN: | 2156-3381 | e-ISSN: | 2156-3403 | DOI: | 10.1109/JPHOTOV.2018.2846674 | ISI #: | 000442366400021 | Rights: | 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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untitled.pdf Restricted Access | Published version | 1.16 MB | Adobe PDF | View/Open Request a copy |
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