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Energy-Loss Reduction as a Strategy to Improve the Efficiency of Dye-Sensitized Solar Cells
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Organic chemistry.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Organic chemistry.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Organic chemistry.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry.
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2019 (English)In: SOLAR RRL, ISSN 2367-198X, Vol. 3, no 10, article id 1900253Article in journal (Refereed) Published
Abstract [en]

Four weak donor backbones (BT, BTP, BT2, and BT3), featuring stepwise enhanced electron-donating capacities, are designed and synthesized. The sp(3) type carbons introduced are tethered with auxiliary groups to generate a better electron-blocking stereoscopic structure. A series of NB dyes are subsequently synthesized from these central cores by end-capping a strong diphenylamine donor and a planar heterocyclic acceptor 4-(benzo[c][1,2,5]thiadiazol-4-ylethynyl)benzoic acid. The fine-tuning of steric configurations and energy levels of the resulting dye molecules reduces the energy losses significantly when applied in dye-sensitized solar cells. These devices offer one of the highest open-circuit voltages (approximate to 1.03 V) reported so far, and high power conversion efficiencies of 9.6%-12.1% using the NB dyes in combination with a well-developed cobalt-tris(4-methoxyphenyl)amine-based tandem electrolyte.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2019. Vol. 3, no 10, article id 1900253
Keywords [en]
dyes, pigments, energy conversion, energy losses, solar cells
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-263353DOI: 10.1002/solr.201900253ISI: 000490744800022OAI: oai:DiVA.org:kth-263353DiVA, id: diva2:1371263
Note

QC 20191119

Available from: 2019-11-19 Created: 2019-11-19 Last updated: 2019-11-19Bibliographically approved

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Yao, ZhaoyangGuo, YaxiaoWang, LinqinHao, YanGuo, YuFranchi, DanieleZhang, FuguoKloo, LarsSun, Licheng

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Yao, ZhaoyangGuo, YaxiaoWang, LinqinHao, YanGuo, YuFranchi, DanieleZhang, FuguoKloo, LarsSun, Licheng
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