Effect of CdCl2 passivation treatment on microstructure and performance of CdSeTe/CdTe thin-film photovoltaic devices
The effects of the CdCl2 passivation treatment on thin-film CdTe photovoltaic films and devices have been extensively studied. Recently, with an addition of CdSeTe layer at the front of the absorber layer, device conversion efficiencies in excess of 19% have been demonstrated. The effects of the CdC...
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| Veröffentlicht in: | Solar energy materials and solar cells 2018-11, Vol.186 (C), p.259-265 |
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| creator | Munshi, Amit H. Kephart, Jason M. Abbas, Ali Danielson, Adam Gḗlinas, Guillaume Beaudry, Jean-Nicolas Barth, Kurt L. Walls, John M. Sampath, Walajabad S. |
| description | The effects of the CdCl2 passivation treatment on thin-film CdTe photovoltaic films and devices have been extensively studied. Recently, with an addition of CdSeTe layer at the front of the absorber layer, device conversion efficiencies in excess of 19% have been demonstrated. The effects of the CdCl2 passivation treatment for devices using CdSeTe has not been studied previously. This is the first reported study of the effect of the treatment on the microstructure of the CdSeTe /CdTe absorber. The device efficiency is |
| doi_str_mv | 10.1016/j.solmat.2018.06.016 |
| format | Article |
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•Microstructural characterization of high efficiency CdSeTe/CdTe graded absorber thin-film photovoltaic devices.•Effect of CdCl2 passivation on CdSeTe/CdTe graded absorber is characterized.•CdCl2 treatment promotes grain growth and material diffusion leading to efficient grading of absorber film.•Several characteristics suggest similarities of CdSeTe/CdTe to CdTe-only film behavior.</description><identifier>ISSN: 0927-0248</identifier><identifier>EISSN: 1879-3398</identifier><identifier>DOI: 10.1016/j.solmat.2018.06.016</identifier><language>eng</language><publisher>United States: Elsevier B.V</publisher><subject>Energy & Fuels ; Materials Science ; Physics</subject><ispartof>Solar energy materials and solar cells, 2018-11, Vol.186 (C), p.259-265</ispartof><rights>2018 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c379t-72789caf2ada25d8c49305c6edd6d2eff600380cf31a52d670386a45f68febbf3</citedby><cites>FETCH-LOGICAL-c379t-72789caf2ada25d8c49305c6edd6d2eff600380cf31a52d670386a45f68febbf3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0927024818303039$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3536,27903,27904,65309</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/1613504$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Munshi, Amit H.</creatorcontrib><creatorcontrib>Kephart, Jason M.</creatorcontrib><creatorcontrib>Abbas, Ali</creatorcontrib><creatorcontrib>Danielson, Adam</creatorcontrib><creatorcontrib>Gḗlinas, Guillaume</creatorcontrib><creatorcontrib>Beaudry, Jean-Nicolas</creatorcontrib><creatorcontrib>Barth, Kurt L.</creatorcontrib><creatorcontrib>Walls, John M.</creatorcontrib><creatorcontrib>Sampath, Walajabad S.</creatorcontrib><creatorcontrib>Colorado State Univ., Fort Collins, CO (United States)</creatorcontrib><title>Effect of CdCl2 passivation treatment on microstructure and performance of CdSeTe/CdTe thin-film photovoltaic devices</title><title>Solar energy materials and solar cells</title><description>The effects of the CdCl2 passivation treatment on thin-film CdTe photovoltaic films and devices have been extensively studied. Recently, with an addition of CdSeTe layer at the front of the absorber layer, device conversion efficiencies in excess of 19% have been demonstrated. The effects of the CdCl2 passivation treatment for devices using CdSeTe has not been studied previously. This is the first reported study of the effect of the treatment on the microstructure of the CdSeTe /CdTe absorber. The device efficiency is < 1% for the as-deposited device but this is dramatically increased by the CdCl2 treatment. Using Scanning Transmission Electron Microscopy (STEM), we show that the CdCl2 passivation of CdSeTe/CdTe films results in the removal of high densities of stacking faults, increase in grain size and reorientation of grains. The CdCl2 treatment leads to grading of the absorber CdSeTe/CdTe films by diffusion of Se between the CdSeTe and CdTe regions. Chlorine decorates the CdSeTe and CdTe grain boundaries leading to their passivation. Direct evidence for these effects is presented using STEM and Energy Dispersive X-ray Analysis (EDX) on device cross-sections prepared using focused ion beam etching. The grading of the Se in the device is quantified using EDX line scans. The comparison of CdSeTe/CdTe device microstructure and composition before and after the CdCl2 treatment provides insights into the important effects of the process and points the way to further improvements that can be made.
•Microstructural characterization of high efficiency CdSeTe/CdTe graded absorber thin-film photovoltaic devices.•Effect of CdCl2 passivation on CdSeTe/CdTe graded absorber is characterized.•CdCl2 treatment promotes grain growth and material diffusion leading to efficient grading of absorber film.•Several characteristics suggest similarities of CdSeTe/CdTe to CdTe-only film behavior.</description><subject>Energy & Fuels</subject><subject>Materials Science</subject><subject>Physics</subject><issn>0927-0248</issn><issn>1879-3398</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kMtqwzAQRUVpoenjD7oQ3dvRw5btTaGY9AGBLpquhSqNiIJtBUkJ9O8r4667GmbmzmHuReiBkpISKtaHMvphVKlkhLYlEWUeXqAVbZuu4LxrL9GKdKwpCKvaa3QT44EQwgSvVui0sRZ0wt7i3vQDw0cVozur5PyEUwCVRpjyesKj08HHFE46nQJgNRl8hGB9GNWkYQF8wg7WvdkBTns3FdYNIz7uffJnPyTlNDZwdhriHbqyaohw_1dv0dfLZte_FduP1_f-eVto3nSpaFjTdlpZpoxitWl11XFSawHGCMPAWkEIb4m2nKqaGdHkTqiqtqK18P1t-S16XLj5cSejdgn0XvtpypYlFZTXpMqiahHN_mIAK4_BjSr8SErknK88yCVfOecriZB5mM-eljPIBs4OwsyHHIVxYcYb7_4H_AKgy4gs</recordid><startdate>201811</startdate><enddate>201811</enddate><creator>Munshi, Amit H.</creator><creator>Kephart, Jason M.</creator><creator>Abbas, Ali</creator><creator>Danielson, Adam</creator><creator>Gḗlinas, Guillaume</creator><creator>Beaudry, Jean-Nicolas</creator><creator>Barth, Kurt L.</creator><creator>Walls, John M.</creator><creator>Sampath, Walajabad S.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>201811</creationdate><title>Effect of CdCl2 passivation treatment on microstructure and performance of CdSeTe/CdTe thin-film photovoltaic devices</title><author>Munshi, Amit H. ; Kephart, Jason M. ; Abbas, Ali ; Danielson, Adam ; Gḗlinas, Guillaume ; Beaudry, Jean-Nicolas ; Barth, Kurt L. ; Walls, John M. ; Sampath, Walajabad S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c379t-72789caf2ada25d8c49305c6edd6d2eff600380cf31a52d670386a45f68febbf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Energy & Fuels</topic><topic>Materials Science</topic><topic>Physics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Munshi, Amit H.</creatorcontrib><creatorcontrib>Kephart, Jason M.</creatorcontrib><creatorcontrib>Abbas, Ali</creatorcontrib><creatorcontrib>Danielson, Adam</creatorcontrib><creatorcontrib>Gḗlinas, Guillaume</creatorcontrib><creatorcontrib>Beaudry, Jean-Nicolas</creatorcontrib><creatorcontrib>Barth, Kurt L.</creatorcontrib><creatorcontrib>Walls, John M.</creatorcontrib><creatorcontrib>Sampath, Walajabad S.</creatorcontrib><creatorcontrib>Colorado State Univ., Fort Collins, CO (United States)</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Solar energy materials and solar cells</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Munshi, Amit H.</au><au>Kephart, Jason M.</au><au>Abbas, Ali</au><au>Danielson, Adam</au><au>Gḗlinas, Guillaume</au><au>Beaudry, Jean-Nicolas</au><au>Barth, Kurt L.</au><au>Walls, John M.</au><au>Sampath, Walajabad S.</au><aucorp>Colorado State Univ., Fort Collins, CO (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of CdCl2 passivation treatment on microstructure and performance of CdSeTe/CdTe thin-film photovoltaic devices</atitle><jtitle>Solar energy materials and solar cells</jtitle><date>2018-11</date><risdate>2018</risdate><volume>186</volume><issue>C</issue><spage>259</spage><epage>265</epage><pages>259-265</pages><issn>0927-0248</issn><eissn>1879-3398</eissn><abstract>The effects of the CdCl2 passivation treatment on thin-film CdTe photovoltaic films and devices have been extensively studied. Recently, with an addition of CdSeTe layer at the front of the absorber layer, device conversion efficiencies in excess of 19% have been demonstrated. The effects of the CdCl2 passivation treatment for devices using CdSeTe has not been studied previously. This is the first reported study of the effect of the treatment on the microstructure of the CdSeTe /CdTe absorber. The device efficiency is < 1% for the as-deposited device but this is dramatically increased by the CdCl2 treatment. Using Scanning Transmission Electron Microscopy (STEM), we show that the CdCl2 passivation of CdSeTe/CdTe films results in the removal of high densities of stacking faults, increase in grain size and reorientation of grains. The CdCl2 treatment leads to grading of the absorber CdSeTe/CdTe films by diffusion of Se between the CdSeTe and CdTe regions. Chlorine decorates the CdSeTe and CdTe grain boundaries leading to their passivation. Direct evidence for these effects is presented using STEM and Energy Dispersive X-ray Analysis (EDX) on device cross-sections prepared using focused ion beam etching. The grading of the Se in the device is quantified using EDX line scans. The comparison of CdSeTe/CdTe device microstructure and composition before and after the CdCl2 treatment provides insights into the important effects of the process and points the way to further improvements that can be made.
•Microstructural characterization of high efficiency CdSeTe/CdTe graded absorber thin-film photovoltaic devices.•Effect of CdCl2 passivation on CdSeTe/CdTe graded absorber is characterized.•CdCl2 treatment promotes grain growth and material diffusion leading to efficient grading of absorber film.•Several characteristics suggest similarities of CdSeTe/CdTe to CdTe-only film behavior.</abstract><cop>United States</cop><pub>Elsevier B.V</pub><doi>10.1016/j.solmat.2018.06.016</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| title | Effect of CdCl2 passivation treatment on microstructure and performance of CdSeTe/CdTe thin-film photovoltaic devices |
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