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Organic:PbS-nanocrystal:Fullerene Hybrid Photovoltaics

Published online by Cambridge University Press:  01 February 2011

Nanditha Dissanayake ,
Ross A Hatton ,
Cristina Giusca ,
Thierry Lutz ,
Richard Curry  and
Ravi Silva
Nanditha Dissanayake
Affiliation:
m.dissanayake@surrey.ac.uk, University of Surrey, Advanced Technology Institute, Faculty of Engineering and Physical Sciences, Guildford, AL, GU27XH, United Kingdom, 0044(0)1483686088, 0044(0)1483689404
Ross A Hatton
Affiliation:
r.hatton@surrey.ac.uk, University of Surrey, Advanced Technology Institute, Faculty of Engineering and Physical Sciences, Guildford, GU27XH, United Kingdom
Cristina Giusca
Affiliation:
c.giusca@surrey.ac.uk, University of Surrey, Advanced Technology Institute, Faculty of Engineering and Physical Sciences, Guildford, GU27XH, United Kingdom
Thierry Lutz
Affiliation:
t.lutz@surrey.ac.uk, University of Surrey, Advanced Technology Institute, Faculty of Engineering and Physical Sciences, Guildford, GU27XH, United Kingdom
Richard Curry
Affiliation:
r.j.curry@surrey.ac.uk, University of Surrey, Advanced Technology Institute, Faculty of Engineering and Physical Sciences, Guildford, GU27XH, United Kingdom
Ravi Silva
Affiliation:
s.silva@surrey.ac.uk, University of Surrey, Advanced Technology Institute, Faculty of Engineering and Physical Sciences, Guildford, GU27XH, United Kingdom
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Abstract

Single and multi junction hybrid devices comprising oligoacenes, PbS quantum dots (PbS-QD) and C60 are demonstrated. A greatly improved performance of the PbS-QD /C60 system was obtained in this work. Furthermore, a study of using acenes (pentacene, tetracene) as light absorbers and photoinduced electron donors to PbS-QD was carried out. Fabricated devices were characterized under 1 Sun simulated solar irradiation and external quantum efficiency (EQE) measurements. The initial hybrid devices demonstrated up to 0.14 % power conversion efficiency under AM1.5G illumination and up to 16 % EQE at 400 nm. The single junction (PbS-QD/C60) devices demonstrated greater than 1.2 % EQE at 1100 nm while multi junctional tetracene/PbS-QD/C60 devices exhibited up to 0.2 % EQE in the infrared region (1100 nm). Ultraviolet photoelectron spectroscopy was used to measure the molecular energy levels in the system under discussion to justify the photoinduced charge transfer. This work demonstrates new device systems which can be potentially be utilized to fabricate high efficient broad band absorbing hybrid photovoltaics.

Keywords

photovoltaicorganicPb
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1102: Symposium LL – Energy Harvesting–From Fundamentals to Devices , 2008 , 1102-LL07-06
Copyright
Copyright © Materials Research Society 2008

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