TY - JOUR
T1 - Two dimensional Langevin recombination in regioregular poly(3- hexylthiophene)
AU - Juška, Gytis
AU - Genevičius, Kristijonas
AU - Nekrašas, Nerijus
AU - Sliaužys, Gytis
AU - Österbacka, Ronald
N1 - Funding Information:
We acknowledge financial support from the Lithuanian State Science and Studies Foundation through Contract No. C-19/2008, the Academy of Finland through the Project No. 118097; Dr. G. Dennler, Dr. J. H. Smått, and Dr. M. Lindén for the help with the samples preparations.
Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - In this work, it is shown that recombination in regioregular poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (RRP3HT:PCBM) bulk-heterojunction solar cells is caused by the two dimensional (2D) Langevin recombination in the lamellar structures of RRP3HT, which are formed after annealing process. Due to 2D Langevin process, bimolecular recombination coefficient is reduced in comparison with three dimensional Langevin case, and bimolecular recombination coefficient depends on the density of charge carriers n1/2. Data obtained from the different experimental techniques (charge extraction with linearly increasing voltage, integral time of flight, double injection current transients and transient absorption spectroscopy) confirms 2D Langevin recombination in RR3PHT.
AB - In this work, it is shown that recombination in regioregular poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (RRP3HT:PCBM) bulk-heterojunction solar cells is caused by the two dimensional (2D) Langevin recombination in the lamellar structures of RRP3HT, which are formed after annealing process. Due to 2D Langevin process, bimolecular recombination coefficient is reduced in comparison with three dimensional Langevin case, and bimolecular recombination coefficient depends on the density of charge carriers n1/2. Data obtained from the different experimental techniques (charge extraction with linearly increasing voltage, integral time of flight, double injection current transients and transient absorption spectroscopy) confirms 2D Langevin recombination in RR3PHT.
UR - http://www.scopus.com/inward/record.url?scp=67650480790&partnerID=8YFLogxK
U2 - 10.1063/1.3141513
DO - 10.1063/1.3141513
M3 - Article
AN - SCOPUS:67650480790
SN - 0003-6951
VL - 95
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 1
M1 - 013303
ER -