Manipulating charge separation dynamics of zinc phthalocyanine based TiO2 films through asymmetrical push-pull structures

Divya Sharma, Gerwin Steen, Tomas Torres, Jennifer Herek, Annemarie Huijser

Research output: Contribution to conferencePaperAcademicpeer-review

Abstract

Zinc phthalocyanine (ZnPc) based dye-sensitized solar cells (DSSCs) that exhibit light absorption in the near IR and excellent chemical stability show great potential for efficient light harvesting and light to electrical energy conversion. However, they have exhibited poor device efficiencies (< 1%) for a long time [1]. Only recently efficiencies up to ∼5% have been realized [2,3]. An important tool in the development towards higher efficiencies involves replacing a symmetric phthalocyanine by an asymmetric equivalent [3] with one electron pulling group (anchoring onto the TiO2) and three electron pushing groups (Fig. 1(a)). This clearly suggests that such an asymmetrical push-pull structure supports light-induced forward electron transfer (from the ZnPc core into the TiO2) and prevents back electron transfer. However, ultrafast photodynamics studies have not been reported so far.

Original languageEnglish
DOIs
Publication statusPublished - 2013
Event2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013 - Munich, Germany
Duration: 12 May 201316 May 2013

Conference

Conference2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013
Abbreviated titleCLEO/Europe-IQEC 2013
CountryGermany
CityMunich
Period12/05/1316/05/13

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