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Article: Charge dynamics in solar cells with a blend of π-conjugated polymer-fullerene studied by transient photo-generated voltage
Title | Charge dynamics in solar cells with a blend of π-conjugated polymer-fullerene studied by transient photo-generated voltage | ||||||||
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Authors | |||||||||
Issue Date | 2012 | ||||||||
Publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/pccp | ||||||||
Citation | Physical Chemistry Chemical Physics, 2012, v. 14 n. 23, p. 8397-8402 How to Cite? | ||||||||
Abstract | The biphasic feature of transient photo-generated voltage (TPV) is investigated in organic solar cells (OSCs) with a blend active layer of poly(3-hexylthiophene) (P3HT) and phenyl C61 butyric acid methyl ester (PCBM). The positive and negative components in biphasic TPV are explained through PCBM only and P3HT only devices. The negative and positive components are ascribed to the dipole formation at the buried interface of P3HT/indium tin oxide (ITO) and PCBM/ITO respectively. Based on these findings, two fundamental phenomena are revealed as follows: (1) interfacial modification on the buried interface inverts the negative component in biphasic TPV to a positive component, which prevents the leakage current channel in the conventional OSC structure; and (2) the solvent chosen transforms the positive component in biphasic TPV into a negative signal, which blocks the leakage current channel in the inverted OSC structure. Consequently, the study of TPV polarity provides the justification of the interaction at the buried interface. Besides, the decay of TPV is found to be bi-exponential, which can be used as a tool to estimate the degree of charge balance in OSCs. © 2012 the Owner Societies. | ||||||||
Persistent Identifier | http://hdl.handle.net/10722/155769 | ||||||||
ISSN | 2023 Impact Factor: 2.9 2023 SCImago Journal Rankings: 0.721 | ||||||||
ISI Accession Number ID |
Funding Information: This work is supported by the UGC grant (#10401466) of the University of Hong Kong and the General Research Fund (HKU#712010) from the Research Grants Council of Hong Kong Special Administrative Region, China as well as the financial support from Jiawei SolarChina, Co. Ltd. We would like to thank Xiaoyuan Hou and Chee-Leung Mak for their useful discussion and Yiping Sun for her assistance in proofreading the manuscript. | ||||||||
References |
DC Field | Value | Language |
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dc.contributor.author | Ding, BF | en_US |
dc.contributor.author | Choy, WCH | en_US |
dc.contributor.author | Kwok, WM | en_US |
dc.contributor.author | Wang, CD | en_US |
dc.contributor.author | Ho, KYF | en_US |
dc.contributor.author | Fung, DDS | en_US |
dc.contributor.author | Xie, FX | en_US |
dc.date.accessioned | 2012-08-08T08:35:15Z | - |
dc.date.available | 2012-08-08T08:35:15Z | - |
dc.date.issued | 2012 | en_US |
dc.identifier.citation | Physical Chemistry Chemical Physics, 2012, v. 14 n. 23, p. 8397-8402 | en_US |
dc.identifier.issn | 1463-9076 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/155769 | - |
dc.description.abstract | The biphasic feature of transient photo-generated voltage (TPV) is investigated in organic solar cells (OSCs) with a blend active layer of poly(3-hexylthiophene) (P3HT) and phenyl C61 butyric acid methyl ester (PCBM). The positive and negative components in biphasic TPV are explained through PCBM only and P3HT only devices. The negative and positive components are ascribed to the dipole formation at the buried interface of P3HT/indium tin oxide (ITO) and PCBM/ITO respectively. Based on these findings, two fundamental phenomena are revealed as follows: (1) interfacial modification on the buried interface inverts the negative component in biphasic TPV to a positive component, which prevents the leakage current channel in the conventional OSC structure; and (2) the solvent chosen transforms the positive component in biphasic TPV into a negative signal, which blocks the leakage current channel in the inverted OSC structure. Consequently, the study of TPV polarity provides the justification of the interaction at the buried interface. Besides, the decay of TPV is found to be bi-exponential, which can be used as a tool to estimate the degree of charge balance in OSCs. © 2012 the Owner Societies. | en_US |
dc.language | eng | en_US |
dc.publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/pccp | en_US |
dc.relation.ispartof | Physical Chemistry Chemical Physics | en_US |
dc.title | Charge dynamics in solar cells with a blend of π-conjugated polymer-fullerene studied by transient photo-generated voltage | en_US |
dc.type | Article | en_US |
dc.identifier.email | Choy, WCH:chchoy@eee.hku.hk | en_US |
dc.identifier.authority | Choy, WCH=rp00218 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1039/c2cp40911a | en_US |
dc.identifier.scopus | eid_2-s2.0-84862161042 | en_US |
dc.identifier.hkuros | 207976 | - |
dc.identifier.hkuros | 207981 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-84862161042&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 14 | en_US |
dc.identifier.issue | 23 | en_US |
dc.identifier.spage | 8397 | en_US |
dc.identifier.epage | 8402 | en_US |
dc.identifier.isi | WOS:000304353600019 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Ding, BF=16309026400 | en_US |
dc.identifier.scopusauthorid | Choy, WCH=7006202371 | en_US |
dc.identifier.scopusauthorid | Kwok, WM=7103129332 | en_US |
dc.identifier.scopusauthorid | Wang, CD=37113178400 | en_US |
dc.identifier.scopusauthorid | Ho, KYF=36673077900 | en_US |
dc.identifier.scopusauthorid | Fung, DDS=53163392700 | en_US |
dc.identifier.scopusauthorid | Xie, FX=45961747700 | en_US |
dc.identifier.issnl | 1463-9076 | - |