Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 강용수 | - |
dc.date.accessioned | 2017-04-25T07:18:35Z | - |
dc.date.available | 2017-04-25T07:18:35Z | - |
dc.date.issued | 2015-08 | - |
dc.identifier.citation | RSC ADVANCES, v. 5, NO 84, Page. 68413-68419 | en_US |
dc.identifier.issn | 2046-2069 | - |
dc.identifier.uri | http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA12889G#!divAbstract | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/26948 | - |
dc.description.abstract | Oligomeric, hydrophobic coadsorbents based on polystyrene (o-PS, M-n = 2600) terminated by a carboxylic acid exhibit dual functions in dye-sensitized solar cells (DSCs): suppression of electron recombination at the TiO2 surface, and enhanced concentration of the strongly-anchored dye, N719, which has two carboxylic acid groups. Engineering the TiO2 surface via o-PS results in the concurrent and significant enhancement of photovoltage and photocurrent, consequently increasing the energy conversion efficiency of DSCs by as much as 28.7%. The electron recombination rate was largely reduced via the blockage of vacant sites with o-PS chains on the TiO2 surface due to the physical hindrance to I(3)(-)s in electrolyte. In addition, the formation of the o-PS:I-2 charge transfer complex at the photoanode/electrolyte interface lessened the effective concentrations of free I-3(-) and/or I-2 for electron recombination. Upon sequential o-PS coadsorption, the concentration of the strongly-anchored dyes on the TiO2 surface was increased via deprotonation of the weakly-anchored dyes, giving rise to an increase in the electron injection efficiency and, subsequently, the overall power conversion efficiency. The dual functions of the o-PS coadsorbent have been therefore demonstrated to increase the overall efficiency of DSCs. | en_US |
dc.description.sponsorship | This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea Center for Artificial Photosynthesis (KCAP) (No. 2009-0093883), the National Creative Research Initiative Center for Intelligent Hybrids (No. 2010-0018290) and the BK21 Plus Program funded by the Ministry of Education, Science, and Technology (MEST) of Korea. | en_US |
dc.language.iso | en | en_US |
dc.publisher | ROYAL SOC CHEMISTRY | en_US |
dc.subject | HIGHLY EFFICIENT | en_US |
dc.subject | PERFORMANCE | en_US |
dc.subject | RECOMBINATION | en_US |
dc.subject | ELECTROLYTES | en_US |
dc.subject | PHOTOVOLTAGE | en_US |
dc.subject | DEPOSITION | en_US |
dc.subject | TITANIA | en_US |
dc.subject | FILMS | en_US |
dc.subject | ACID | en_US |
dc.title | TiO2 surface engineering with multifunctional oligomeric polystyrene coadsorbent for dye-sensitized solar cells | en_US |
dc.type | Article | en_US |
dc.relation.no | 84 | - |
dc.relation.volume | 5 | - |
dc.identifier.doi | 10.1039/c5ra12889g | - |
dc.relation.page | 68413-68419 | - |
dc.relation.journal | RSC ADVANCES | - |
dc.contributor.googleauthor | Lee, Yong-Gun | - |
dc.contributor.googleauthor | Song, Donghoon | - |
dc.contributor.googleauthor | Jung, June Hyuk | - |
dc.contributor.googleauthor | Wooh, Sanghyuk | - |
dc.contributor.googleauthor | Park, suit | - |
dc.contributor.googleauthor | Cho, Woohyung | - |
dc.contributor.googleauthor | Wei, Wei | - |
dc.contributor.googleauthor | Char, Kookheon | - |
dc.contributor.googleauthor | Kang, Yong Soo | - |
dc.relation.code | 2015011569 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF ENERGY ENGINEERING | - |
dc.identifier.pid | kangys | - |
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