Publications

Skip Navigation Links.
Recently Published
Expand per documenttypeper documenttype
Collapse per Unitper Unit
Expand Business DevelopmentBusiness Development
Expand Biomass & Energy EfficiencyBiomass & Energy Efficiency
Expand Policy StudiesPolicy Studies
Expand Corporate CommunicationsCorporate Communications
Expand CorporateCorporate
Expand Environment & Energy EngineeringEnvironment & Energy Engineering
Expand Program DevelopmentProgram Development
Expand Quality Safety Health and EnvironmentQuality Safety Health and Environment
Expand Strategy & PlanningStrategy & Planning
Expand Wind EnergyWind Energy
Collapse Solar EnergySolar Energy
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
Expand per Clusterper Cluster

Search for publications:


Limit search to the fields

ECN publication
Title:
Exploring the limits of hybrid TiO2/conjugated polymer photovoltaic cells
 
Author(s):
Slooff, L.H.; Veenstra, S.C.; Kroon, J.M.; Koetse, M.M.; Sweelssen, J.
 
Published by: Publication date:
ECN Solar Energy 1-11-2005
 
ECN report number: Document type:
ECN-RX--05-030 Conference Paper
 
Number of pages: Full text:
8 Download PDF  

Presented at: SPIE Conference; Optics & Phonotonics, San Diego, USA, 31 juli 2005-4 augustus 2005.

Abstract:

In hybrid polymer photovoltaics, conjugated polymers are combined with wide bandgap metal oxide semiconductors like TiO2 or ZnO. Reported maximum power conversion efficiencies (PCE) at AM1.5G conditions for a hybrid polymer bulkheterojunction device are up to 1.6 %. In this paper we report on the current-voltage characteristics of bi-layer devices consisting of TiO2 and a conjugated polymer. Several polymers with different optical bandgap were studied. The maximum External Quantum Efficiency (EQE) of the devices is comparable, but the PCE differs considerably (0.2-0.5%). The differences can for a large part be explained by the differences in optical bandgap of the polymers. It is shown that a low band gap is beneficial for the short circuit current, but does not automatically result in a high PCE as relative shifts of the highest occupied molecular orbital (HOMO) energy levels of the polymers reduce the open circuit voltage (Voc). The calculations show that a PCE up to ~ 19 % can be achieved using the maximum possible Voc and a fill factor of 80%. Judicious engineering of material combinations is required to achieve such a power output, and it expresses the need for a continuing search on potentially low cost, efficient metal oxide/polymer BHJ tructures.


Back to List