Spray-pyrolyzed vs spin-cast titania films in bilayer hybrid solar cells with a small-molecular hole transporting dye

Titania films as acceptor layer in bilayer hybrid solar cell devices were prepared by spray-pyrolysis and by spin-casting. Both preparation methods resulted in anatase titania films with similar optical and electronic properties. Spray pyrolysis resulted in dense TiO2 films grown onto the conducting glass substrates while spin-casting gave rise to titania films with a nanoporous morphology. Hybrid solar cell devices with varying layer thickness of the small molecular semiconducting dye TDCV-TPA were investigated. Devices built with spray-pyrolyzed titania substrates yielded conversion effiencies up to 0.47 %, limited by the exciton diffusion length in TDCV-TPA. Spin-cast titania substrates exhibited short circuits for devices with thin dye layer thickness but gave up to 0.6 % conversion efficiency for thicker dye layers due to the higher interfacial area for charge separation and the dye acting as an insultator.

Spadavecchia, FrancescaDipartimento di Chimica Fisica ed Elettrochimica, Università degli Studi di Milano (författare)
Nonomura, KazuteruUppsala universitet,Fysikalisk kemi,Anders Hagfeldt (författare)
Palmgren, PålUppsala universitet,Institutionen för fysik och astronomi (författare)
Cappelletti, GiuseppeDipartimento di Chimica Fisica ed Elettrochimica, Università degli Studi di Milano (författare)
Hagfeldt, AndersUppsala universitet,Fysikalisk kemi,Hagfeldt (författare)
Johansson, Erik M. J.Uppsala universitet,Fysikalisk kemi,Hagfeldt (författare)
Boschloo, GerritUppsala universitet,Fysikalisk kemi,Hagfeldt (författare)
Uppsala universitetFysikalisk kemi (creator_code:org_t)

Av författaren/redakt...: Unger, Eva; Spadavecchia, Fr ...; Nonomura, Kazute ...; Palmgren, Pål; Cappelletti, Giu ...; Hagfeldt, Anders; visa fler...; Johansson, Erik ...; Boschloo, Gerrit; visa färre...

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