Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4
Chemical disorder in semiconductors is important to characterize reliably because it affects materials performance, for instance by introducing potential fluctuations and recombination sites. It also represents a means to control material properties, to far exceed the limits of equilibrium thermodyn...
| Main Authors: | , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Chemical Society (ACS)
2020
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| Online Access: | https://hdl.handle.net/1721.1/126260 |
| _version_ | 1811093594234159104 |
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| author | Ye, Kevin Siah, Sin Cheng Erslev, Peter T. Akey, Austin Settens, Charles M Hoque, Md Shafkat Bin Braun, Jeffrey Hopkins, Patrick Teeter, Glenn Buonassisi, Anthony Jaramillo, Rafael |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Ye, Kevin Siah, Sin Cheng Erslev, Peter T. Akey, Austin Settens, Charles M Hoque, Md Shafkat Bin Braun, Jeffrey Hopkins, Patrick Teeter, Glenn Buonassisi, Anthony Jaramillo, Rafael |
| author_sort | Ye, Kevin |
| collection | MIT |
| description | Chemical disorder in semiconductors is important to characterize reliably because it affects materials performance, for instance by introducing potential fluctuations and recombination sites. It also represents a means to control material properties, to far exceed the limits of equilibrium thermodynamics. We present a study of highly disordered Cu-Zn-Sn-S (d-CZTS) films along the Cu2SnS3-Cu2ZnSnS4-ZnS binary line, deposited by physical vapor deposition. Deposition at low temperature kinetically stabilizes compositions that are well outside of the narrow, equilibrium solid solution of kesterite (Cu2ZnSnS4). Here we study d-CZTS and its thermal treatment using complementary characterization techniques: X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), and transmission electron microscopy (TEM). We find that cations in d-CZTS are highly disordered while the sulfur anions remain in a well-defined, cubic close-packed lattice. On the atomic scale, composition fluctuations are accommodated preferentially by stacking faults. Kinetically-stabilized cation disorder can produce nonequilibrium semiconductor alloys with a wide range of band gap, electronic conductivity, and thermal conductivity. d-CZTS therefore represents a processing route to optimizing materials for optoelectronic device elements such as light absorbers, window layers, and thermal barriers. |
| first_indexed | 2024-09-23T15:47:36Z |
| format | Article |
| id | mit-1721.1/126260 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:47:36Z |
| publishDate | 2020 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1262602022-10-02T04:09:20Z Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4 Ye, Kevin Siah, Sin Cheng Erslev, Peter T. Akey, Austin Settens, Charles M Hoque, Md Shafkat Bin Braun, Jeffrey Hopkins, Patrick Teeter, Glenn Buonassisi, Anthony Jaramillo, Rafael Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering MIT Materials Research Laboratory Chemical disorder in semiconductors is important to characterize reliably because it affects materials performance, for instance by introducing potential fluctuations and recombination sites. It also represents a means to control material properties, to far exceed the limits of equilibrium thermodynamics. We present a study of highly disordered Cu-Zn-Sn-S (d-CZTS) films along the Cu2SnS3-Cu2ZnSnS4-ZnS binary line, deposited by physical vapor deposition. Deposition at low temperature kinetically stabilizes compositions that are well outside of the narrow, equilibrium solid solution of kesterite (Cu2ZnSnS4). Here we study d-CZTS and its thermal treatment using complementary characterization techniques: X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), and transmission electron microscopy (TEM). We find that cations in d-CZTS are highly disordered while the sulfur anions remain in a well-defined, cubic close-packed lattice. On the atomic scale, composition fluctuations are accommodated preferentially by stacking faults. Kinetically-stabilized cation disorder can produce nonequilibrium semiconductor alloys with a wide range of band gap, electronic conductivity, and thermal conductivity. d-CZTS therefore represents a processing route to optimizing materials for optoelectronic device elements such as light absorbers, window layers, and thermal barriers. Army Research Office (Grant W911NF-16-1-0406) 2020-07-20T18:13:18Z 2020-07-20T18:13:18Z 2019-09 2019-09 2020-07-16T16:43:32Z Article http://purl.org/eprint/type/JournalArticle 0897-4756 1520-5002 https://hdl.handle.net/1721.1/126260 Ye, Kevin et al. "Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4." Chemistry of Materials 31, 20 (September 2019): 8402–8412 © 2019 American Chemical Society en http://dx.doi.org/10.1021/acs.chemmater.9b02287 Chemistry of Materials Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society (ACS) Prof. Jaramillo |
| spellingShingle | Ye, Kevin Siah, Sin Cheng Erslev, Peter T. Akey, Austin Settens, Charles M Hoque, Md Shafkat Bin Braun, Jeffrey Hopkins, Patrick Teeter, Glenn Buonassisi, Anthony Jaramillo, Rafael Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4 |
| title | Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4 |
| title_full | Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4 |
| title_fullStr | Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4 |
| title_full_unstemmed | Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4 |
| title_short | Tuning Electrical, Optical, and Thermal Properties through Cation Disorder in Cu2ZnSnS4 |
| title_sort | tuning electrical optical and thermal properties through cation disorder in cu2znsns4 |
| url | https://hdl.handle.net/1721.1/126260 |
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