Electro-Optics of Colloidal Quantum Dot Solids for Thin-FilmSolar Cells
2016 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 26, no 8, 1253-1260 p.Article, review/survey (Refereed) Published
The electro-optics of thin-fi lm stacks within photovoltaic devices playsa critical role for the exciton and charge generation and therefore thephotovoltaic performance. The complex refractive indexes of each layer inheterojunction colloidal quantum dot (CQD) solar cells are measured andthe optical electric fi eld is simulated using the transfer matrix formalism.The exciton generation rate and the photocurrent density as a function ofthe quantum dot solid thickness are calculated and the results from thesimulations are found to agree well with the experimentally determinedresults. It can therefore be concluded that a quantum dot solid may bemodeled with this approach, which is of general interest for this type ofmaterials. Optimization of the CQD solar cell is performed by using theoptical simulations and a maximum solar energy conversion effi ciency of6.5% is reached for a CQD solid thickness of 300 nm.
Place, publisher, year, edition, pages
2016. Vol. 26, no 8, 1253-1260 p.
charge generation; electro-optical materials; quantum dots; solar cells; transfer matrix formalism
IdentifiersURN: urn:nbn:se:uu:diva-278967DOI: 10.1002/adfm.201503338ISI: 000371078100012OAI: oai:DiVA.org:uu-278967DiVA: diva2:907278
FunderGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of TechnologySwedish Energy AgencySwedish Research Council FormasÅForsk (Ångpanneföreningen's Foundation for Research and Development)Swedish Research Council