Regenerative PbS and CdS Quantum Dot Sensitized Solar Cells with a Cobalt Complex as Hole Mediator Export

@article{citeulike:5395251, abstract = {Metal sulfide (PbS and CdS) quantum dots (QDs) were prepared over mesoporous TiO2 films by improved successive ionic layer adsorption and reaction (SILAR) processes. The as-prepared QD-sensitized electrodes were combined with a cobalt complex redox couple [Co(o-phen)3]2+/3+ to make a regenerative liquid-type photovoltaic cell. The optimized PbS QD-sensitized solar cells exhibited promising incident photon-to-current conversion efficiency (IPCE) of over 50\% and an overall conversion efficiency of 2\% at 0.1 sun in a regenerative mode. The overall photovoltaic performance of the PbS QD-sensitized cells was observed to be dependent on the final turn of the SILAR process, giving a better result when the final deposition was Pb2+, not S2-. However, in the case of CdS QD-sensitized cells, S2- termination was better than that of Cd2+. The cobalt complex herein used as a regenerative redox couple was found to be more efficient in generating photocurrents from PbS QD cells than the typical hole scavenger Na2S in a three-electrode configuration. The CdS-sensitized cell with this redox mediator also showed better defined current−voltage curves and an IPCE reaching 40\%.}, author = {Lee, Hyo J. and Chen, Peter and Moon, Soo-Jin and Sauvage, Frédéric and Sivula, Kevin and Bessho, Takeru and Gamelin, Daniel R. and Comte, Pascal and Zakeeruddin, Shaik M. and Seok, Sang I. and Grätzel, Michael and Nazeeruddin, Md}, citeulike-article-id = {5395251}, citeulike-linkout-0 = {http://dx.doi.org/10.1021/la900247r}, citeulike-linkout-1 = {http://pubs.acs.org/doi/abs/10.1021/la900247r}, day = {7}, doi = {10.1021/la900247r}, journal = {Langmuir}, keywords = {alert, article}, month = {July}, number = {13}, pages = {7602--7608}, posted-at = {2009-08-07 22:14:00}, priority = {2}, title = {Regenerative PbS and CdS Quantum Dot Sensitized Solar Cells with a Cobalt Complex as Hole Mediator}, url = {http://dx.doi.org/10.1021/la900247r}, volume = {25}, year = {2009} }

TY - JOUR ID - citeulike:5395251 L3 - citeulike-article-id:5395251 N2 - Metal sulfide (PbS and CdS) quantum dots (QDs) were prepared over mesoporous TiO2 films by improved successive ionic layer adsorption and reaction (SILAR) processes. The as-prepared QD-sensitized electrodes were combined with a cobalt complex redox couple [Co(o-phen)3]2+/3+ to make a regenerative liquid-type photovoltaic cell. The optimized PbS QD-sensitized solar cells exhibited promising incident photon-to-current conversion efficiency (IPCE) of over 50% and an overall conversion efficiency of 2% at 0.1 sun in a regenerative mode. The overall photovoltaic performance of the PbS QD-sensitized cells was observed to be dependent on the final turn of the SILAR process, giving a better result when the final deposition was Pb2+, not S2-. However, in the case of CdS QD-sensitized cells, S2- termination was better than that of Cd2+. The cobalt complex herein used as a regenerative redox couple was found to be more efficient in generating photocurrents from PbS QD cells than the typical hole scavenger Na2S in a three-electrode configuration. The CdS-sensitized cell with this redox mediator also showed better defined current−voltage curves and an IPCE reaching 40%. IS - 13 JF - Langmuir EP - 7608 TI - Regenerative PbS and CdS Quantum Dot Sensitized Solar Cells with a Cobalt Complex as Hole Mediator VL - 25 SP - 7602 KW - alert KW - article AU - Lee, Hyo AU - Chen, Peter AU - Moon, Soo-Jin AU - Sauvage, Frédéric AU - Sivula, Kevin AU - Bessho, Takeru AU - Gamelin, Daniel AU - Comte, Pascal AU - Zakeeruddin, Shaik AU - Seok, Sang AU - Grätzel, Michael AU - Nazeeruddin, Md PY - 2009/07/07/ UR - http://dx.doi.org/10.1021/la900247r ER -