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Highly Efficient Solid-State Dye-Sensitized Solar Cells Based on Triphenylamine Dyes
KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD.
KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD. KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD. KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD.
Vise andre og tillknytning
2011 (engelsk)Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 21, nr 15, s. 2944-2952Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Two triphenylamine-based metal-free organic sensitizers, D35 with a single anchor group and M14 with two anchor groups, have been applied in dye-sensitized solar cells (DSCs) with a solid hole transporting material or liquid iodide/triiodide based electrolyte. Using the molecular hole conductor 2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenyl-amine)9,9'-spirobifluorene (spiro-OMeTAD), good overall conversion efficiencies of 4.5% for D35 and 4.4% for M14 were obtained under standard AM 1.5G illumination (100 mW cm(-2)). Although M14 has a higher molar extinction coefficient (by similar to 60%) and a slightly broader absorption spectrum compared to D35, the latter performs slightly better due to longer lifetime of electrons in the TiO(2), which can be attributed to differences in the molecular structure. In iodide/triiodide electrolyte-based DSCs, D35 outperforms M14 to a much greater extent, due to a very large increase in electron lifetime. This can be explained by both the greater blocking capability of the D35 monolayer and the smaller degree of interaction of triiodide (iodine) with D35 compared to M14. The present work gives some insight into how the molecular structure of sensitizer affects the performance in solid-state and iodide/triiodide-based DSCs.

sted, utgiver, år, opplag, sider
2011. Vol. 21, nr 15, s. 2944-2952
Emneord [en]
ORGANIC-DYE, CHARGE RECOMBINATION, SPIRO-MEOTAD, PERFORMANCE, ELECTRON, CONVERSION, TRANSPORT, QUANTIFICATION, COORDINATION, COADSORBENT
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-39518DOI: 10.1002/adfm.201002319ISI: 000294164900018Scopus ID: 2-s2.0-80051678195OAI: oai:DiVA.org:kth-39518DiVA, id: diva2:442091
Forskningsfinansiär
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Merknad

QC 20110920

Tilgjengelig fra: 2011-09-20 Laget: 2011-09-12 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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