2024-03-28T16:21:53Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1442282022-05-12T09:33:22Zcom_10261_46com_10261_3col_10261_299
Understanding the effect of unintentional doping on transport optimization and analysis in efficient organic bulk-heterojunction solar cells
Deledalle, Florent
Kirchartz, Thomas
Vezie, Michelle S.
Campoy Quiles, Mariano
Tuladhar, Pabitra S.
Nelson, Jenny
Durrant, James R.
Engineering and Physical Sciences Research Council (UK)
Ministerio de Economía y Competitividad (España)
Cross-coupling reactions
High-performance
Recombination
Space-charge
Charge-density dependence
Donor polymers
Pi-conjugated polymers
Impedance spectroscopy
Photovoltaic devices
Carrier mobility
In this paper, we provide experimental evidence of the effects of unintentional p-type doping on the performance and the apparent recombination dynamics of bulk-heterojunction solar cells. By supporting these experimental observations with drift-diffusion simulations on two batches of the same efficient polymer-fullerene solar cells with substantially different doping levels and at different thicknesses, we investigate the way the presence of doping affects the interpretation of optoelectronic measurements of recombination and charge transport in organic solar cells. We also present experimental evidence on how unintentional doping can lead to excessively high apparent reaction orders. Our work suggests first that the knowledge of the level of dopants is essential in the studies of recombination dynamics and carrier transport and that unintentional doping levels need to be reduced below approximately 7 × 1015 cm-3 for full optimization around the second interference maximum of highly efficient polymer-fullerene solar cells.
2017-02-17T13:24:36Z
2017-02-17T13:24:36Z
2015-03-24
2017-02-17T13:24:37Z
artículo
Physical Review X 5(1): 011032 (2015)
2160-3308
http://hdl.handle.net/10261/144228
10.1103/PhysRevX.5.011032
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100000266
eng
Publisher's version
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496
openAccess
American Physical Society