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Highly stable carbon-based perovskite solar cell with a record efficiency of over 18% via hole transport engineering

Chu, Qian-Qian; Ding, Bin; Peng, Jun; Shen, Heping; Li, Xiaolei; Liu, Yan; Li, Cheng-Xin; Li, Chang-Jiu; Yang, Guan-Jun; White, Thomas; Catchpole, Kylie

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Carbon-based perovskite solar cells show great potential owing to their low-cost production and superior stability in air, compared to their counterparts using metal contacts. The photovoltaic performance of carbon-based PSCs, however, has been progressing slowly in spite of an impressive efficiency when they were first reported. One of the major obstacles is that the hole transport materials developed for state-of-the-art Au-based PSCs are not suitable for carbon-based PSCs. Here, we develop a...[Show more]

dc.contributor.authorChu, Qian-Qian
dc.contributor.authorDing, Bin
dc.contributor.authorPeng, Jun
dc.contributor.authorShen, Heping
dc.contributor.authorLi, Xiaolei
dc.contributor.authorLiu, Yan
dc.contributor.authorLi, Cheng-Xin
dc.contributor.authorLi, Chang-Jiu
dc.contributor.authorYang, Guan-Jun
dc.contributor.authorWhite, Thomas
dc.contributor.authorCatchpole, Kylie
dc.date.accessioned2019-06-12T00:32:56Z
dc.date.available2019-06-12T00:32:56Z
dc.identifier.issn1005-0302
dc.identifier.urihttp://hdl.handle.net/1885/164019
dc.description.abstractCarbon-based perovskite solar cells show great potential owing to their low-cost production and superior stability in air, compared to their counterparts using metal contacts. The photovoltaic performance of carbon-based PSCs, however, has been progressing slowly in spite of an impressive efficiency when they were first reported. One of the major obstacles is that the hole transport materials developed for state-of-the-art Au-based PSCs are not suitable for carbon-based PSCs. Here, we develop a low-temperature, solution-processed Poly(3-hexylthiophene-2,5-diyl) (P3HT)/graphene composite hole transport layer, that is compatible with paintable carbon-electrodes to produce state-of-the-art perovskite devices. Space-charge-limited-current measurements reveal that the as-prepared P3HT/graphene composite exhibits outstanding charge mobility and thermal tolerance, with hole mobility increasing from 8.3×10^-3 cm^2·V^-1·s^-1 (as-deposited) to 1.2×10^-2 cm^2·V^-1·s^-1 (after annealing at 100C) - two orders of magnitude larger than pure P3HT. The improved charge transport and extraction provided by the composite HTL provides a significant efficiency improvement compared to cells with a pure P3HT HTL. As a result, we report carbon-based solar cells with a record efficiency of 17.8% (certified by Newport); and the first perovskite cells to be certified under the stabilized testing protocol. The outstanding device stability is demonstrated by only 3% drop after storage in ambient conditions (humidity: ca. 50%) for 1680 h (non-encapsulated), and retention of ca. 89% of their original output under continuous 1-Sun illumination at room-temperature for 600 h (encapsulated) in a nitrogen environment.
dc.description.sponsorshipAustralian Renewable Energy Agency, National Program for Support of Top-notch Young Professionals (China).
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherElsevier
dc.rights© 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science&Technology
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceJournal of Materials Science & Technology
dc.subjectPhotovoltaics
dc.subjectPerovskite solar cells
dc.titleHighly stable carbon-based perovskite solar cell with a record efficiency of over 18% via hole transport engineering
dc.typeJournal article
local.identifier.citationvolume35
dc.date.issued2019-06
local.publisher.urlhttps://www.elsevier.com/en-au
local.type.statusSubmitted Version
local.contributor.affiliationDing, Bin, Research School of Engineering, The Australian National University
local.contributor.affiliationPeng, Jun, Research School of Engineering, The Australian National University
local.contributor.affiliationShen, Heping, Research School of Engineering, The Australian National University
local.contributor.affiliationWhite, Thomas, Research School of Engineering, The Australian National University
local.contributor.affiliationCatchpole, Kylie, Research School of Engineering, The Australian National University
local.description.embargo2021-06-30
local.bibliographicCitation.issue6
local.bibliographicCitation.startpage987
local.bibliographicCitation.lastpage993
local.identifier.doi10.1016/j.jmst.2018.12.025
dcterms.accessRightsOpen Access
dc.provenancehttp://sherpa.ac.uk/romeo/issn/1005-0302/..."author can archive post-print (ie final draft post-refereeing)" from SHERPA/RoMEO site (as at 12/06/19).
dc.rights.licenseThis manuscript version is made available under the CC-BY-NC-ND 4.0 license
CollectionsANU Research Publications

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