Charge recombination losses in thiophene-substituted porphyrin dyesensitized solar cells
<div> Two new porphyrins that incorporate thiophene substituents as spacers between the conjugated</div> <div> porphyrin core and the anchoring cyanoacrylate group have been synthesised. The two dyes differ in the</div> <div> number of thiophene bridges; porphyrin 1a ha...
| Authors: | , , , , , , |
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| Format: | article |
| Publication Date: | 2015 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2072/305871 |
| Online Access: | http://hdl.handle.net/2072/305871 https://doi.org/10.1016/j.dyepig.2015.11.002 |
| Access Level: | Open access |
| Keyword: | Porphyrins Dye-sensitized solar cells Charge extraction Transient photovoltage Thienylenevinylene PC71BM |
| Summary: | <div> Two new porphyrins that incorporate thiophene substituents as spacers between the conjugated</div> <div> porphyrin core and the anchoring cyanoacrylate group have been synthesised. The two dyes differ in the</div> <div> number of thiophene bridges; porphyrin 1a has only one thiophene group and porphyrin 1b has two</div> <div> thiophene rings connected by a double bond. The measured light-to-energy conversion efficiencies in 1a</div> <div> and 1b were assessed using two different electrolytes, LP1 and LP2, which differ in the presence of tertbutyl</div> <div> pyridine in LP1. An efficiency of 6% under standard measurement conditions has been achieved for</div> <div> 1a þ LP1. However, for porphyrin 1b the use of electrolyte LP1 led to lower efficiencies and a value of</div> <div> approximately 4% was obtained. The differences between the two types of solar cells and the electrolytes</div> <div> have been studied in-depth using photo-induced time-resolved techniques such as CE (Charge Extraction)</div> <div> and TPV (Transient PhotoVoltage).</div> |
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