Show simple item record

dc.contributor.authorMandujano-Ramírez, Humberto J.
dc.contributor.authorGonzález Vázquez, J. P.
dc.contributor.authorOskam, Gerko
dc.contributor.authorDittrich, Thomas
dc.contributor.authorGarcia-Belmonte, Germà
dc.contributor.authorMora-Sero, Ivan
dc.contributor.authorBisquert, Juan
dc.contributor.authorAnta, Juan A.
dc.identifier.citationPhys. Chem. Chem. Phys., 2014, 16, 4082ca_CA
dc.description.abstractMany recent advances in novel solar cell technologies are based on charge separation in disordered semiconductor heterojunctions. In this work we use the Random Walk Numerical Simulation (RWNS) method to model the dynamics of electrons and holes in two disordered semiconductors in contact. Miller–Abrahams hopping rates and a tunnelling distance-dependent electron–hole annihilation mechanism are used to model transport and recombination, respectively. To test the validity of the model, three numerical ‘‘experiments’’ have been devised: (1) in the absence of constant illumination, charge separation has been quantified by computing surface photovoltage (SPV) transients. (2) By applying a continuous generation of electron–hole pairs, the model can be used to simulate a solar cell under steady-state conditions. This has been exploited to calculate open-circuit voltages and recombination currents for an archetypical bulk heterojunction solar cell (BHJ). (3) The calculations have been extended to nanostructured solar cells with inorganic sensitizers to study, specifically, non-ideality in the recombination rate. The RWNS model in combination with exponential disorder and an activated tunnelling mechanism for transport and recombination is shown to reproduce correctly charge separation parameters in these three ‘‘experiments’’. This provides a theoretical basis to study relevant features of novel solar cell technologies.ca_CA
dc.format.extent10 p.ca_CA
dc.publisherRoyal Society of Chemistryca_CA
dc.relation.isPartOfPhys. Chem. Chem. Phys., 2014, 16, 4082--4091ca_CA
dc.rightsThis journal is © the Owner Societies 2014ca_CA
dc.titleCharge separation at disordered semiconductor heterojunctions from random walk numerical simulationsca_CA

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record