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All-Solution-Processed Cu2ZnSnS4 Solar Cells with Self-Depleted Na2S Back Contact Modification Layer

Gu, Youchen; Shen, Heping; Ye, Chen; Dai, Xuezeng; Cui, Qian; Li, Jianbao; Hao, Feng; Hao, Xiaojing; Lin, Hong

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The thin‐film photovoltaic material Cu2ZnSnS4 (CZTS) has drawn worldwide attention in recent years due to its earth‐abundant, nontoxic element constitution, and remarkable photovoltaic performance. Although state‐of‐the‐art power conversion efficiency is achieved by hydrazine‐based methods, effort to fabricate such devices in a high throughput, environmental‐friendly way is still highlydesired. Here a hydrazine‐free all‐solution‐processed CZTS solar cell with Na2S self‐depleted back contact...[Show more]

dc.contributor.authorGu, Youchen
dc.contributor.authorShen, Heping
dc.contributor.authorYe, Chen
dc.contributor.authorDai, Xuezeng
dc.contributor.authorCui, Qian
dc.contributor.authorLi, Jianbao
dc.contributor.authorHao, Feng
dc.contributor.authorHao, Xiaojing
dc.contributor.authorLin, Hong
dc.date.accessioned2019-04-10T11:03:40Z
dc.identifier.issn1616-301X
dc.identifier.urihttp://hdl.handle.net/1885/159450
dc.description.abstractThe thin‐film photovoltaic material Cu2ZnSnS4 (CZTS) has drawn worldwide attention in recent years due to its earth‐abundant, nontoxic element constitution, and remarkable photovoltaic performance. Although state‐of‐the‐art power conversion efficiency is achieved by hydrazine‐based methods, effort to fabricate such devices in a high throughput, environmental‐friendly way is still highlydesired. Here a hydrazine‐free all‐solution‐processed CZTS solar cell with Na2S self‐depleted back contact modification layer for the first time is demonstrated, using a ball‐milled CZTS as light absorber, low‐temperature solution‐processed ZnO electron‐transport layer as well as silver‐nanowire transparent electrode. The inserting of Na2S self‐depleted layer is proven to effectively stabilize the CZTS/Mo interface by eliminating a detrimental phase segregation reaction between CZTS and Mo‐coated soda lime glass, thus leading to a better crystallinity of CZTS light absorbing layer, enhanced carrier transportation at CZTS/Mo interface as well as a smaller series resistance. Furthermore, the self‐depletion feature of the Na2S modification layer also averts hole‐transportation barrier within the devices. The results show the vital importance of interfacial engineering for these CZST devices and the Na2S interface layer can be extended to other optoelectronic devices using Mo contact.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherJohn Wiley & Sons Ltd.
dc.sourceAdvanced Functional Materials
dc.titleAll-Solution-Processed Cu2ZnSnS4 Solar Cells with Self-Depleted Na2S Back Contact Modification Layer
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume28
dc.date.issued2018
local.identifier.absfor010203 - Calculus of Variations, Systems Theory and Control Theory
local.identifier.absfor090609 - Signal Processing
local.identifier.absfor090605 - Photodetectors, Optical Sensors and Solar Cells
local.identifier.ariespublicationu1029610xPUB103
local.type.statusPublished Version
local.contributor.affiliationGu, Youchen, Tsinghua University
local.contributor.affiliationShen, Heping, College of Engineering and Computer Science, ANU
local.contributor.affiliationYe, Chen, University of Science and Technology Beijing
local.contributor.affiliationDai, Xuezeng, Tsinghua University
local.contributor.affiliationCui, Qian, Tsinghua University
local.contributor.affiliationLi, Jianbao, Hainan University
local.contributor.affiliationHao, Feng, University of Electronic Science and Technology of China
local.contributor.affiliationHao, Xiaojing, University of New South Wales
local.contributor.affiliationLin, Hong, Tsinghua University
local.description.embargo2039-12-31
local.bibliographicCitation.issue14
local.identifier.doi10.1002/adfm.201703369
dc.date.updated2019-03-12T07:23:46Z
local.identifier.scopusID2-s2.0-85040796570
dc.provenanceJournal: Advanced Functional Materials (ISSN: 1616-301X, ESSN: 1616-3028) RoMEO: This is a RoMEO yellow journal Paid OA: A paid open access option is available for this journal. Author's Pre-print: green tick author can archive pre-print (ie pre-refereeing) Author's Post-print: grey tick subject to Restrictions below, author can archive post-print (ie final draft post-refereeing) Restrictions: 12 months embargo Publisher's Version/PDF: cross author cannot archive publisher's version/PDF
CollectionsANU Research Publications

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