Photocurrent Enhancement of Dye-Sensitized Solar Cells owing to Increased Dye-Adsorption onto Silicon-Nanoparticle-Coated Titanium-Dioxide Films
- Authors
- Ha, Eun-Sung; Yoo, Beomjin; Baik, Hionsuck; Lee, Yeonhee; Kim, Kang-Jin
- Issue Date
- 6월-2012
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- charge transfer; dye-sensitized solar cells; nanoparticles; silicon; sodium naphthalide
- Citation
- CHEMISTRY-AN ASIAN JOURNAL, v.7, no.7, pp.1624 - 1629
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMISTRY-AN ASIAN JOURNAL
- Volume
- 7
- Number
- 7
- Start Page
- 1624
- End Page
- 1629
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/108280
- DOI
- 10.1002/asia.201101055
- ISSN
- 1861-4728
- Abstract
- The inverse-micellar preparation of Si nanoparticles (Nps) was improved by utilizing sodium naphthalide. The Si Nps were subsequently functionalized with 4-vinylbenzoic acid for their attachment onto TiO2 films of dye-sensitized solar cells (DSSCs). The average diameter of the COOH-functionalized Si (Si?COOH) Nps was 4.6(+/- 1.7) nm. Depth profiling by secondary-ion mass spectrometry revealed that the Si Nps were uniformly attached onto the TiO2 films. The number of RuII dye molecules adsorbed onto a TiO2 film that was treated with the Si?COOH Nps was 42?% higher than that on the untreated TiO2 film. As a result, DSSCs that incorporated the Si?COOH Nps exhibited higher short-circuit photocurrent density and an overall energy-conversion efficiency than the untreated DSSCs by 22?% and 27?%, respectively. This enhanced performance, mostly owing to the intramolecular charge-transfer to TiO2 from the dye molecules that were anchored to the Si?COOH Nps, was confirmed by comparing the performance with two different RuIIbipyridine dyes (N719 and N749).
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