Modified synthesis of FeS2 quantum dots for hybrid bulk-heterojunction solar cells

Phase pure and well-dispersed FeS2 quantum dots (QDs) have been synthesized with a method combining hot-injection and solvothermal reaction at a relatively low temperature. Hybrid composites composed of organic semiconductor and FeS2 QDs effectively dissociates excitons at the donor–acceptor interfa...

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Bibliographic Details
Published inMaterials letters Vol. 157; pp. 235 - 238
Main Authors Yu, Ping, Qu, Shengchun, Jia, Caihong, Liu, Kong, Tan, Furui
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.10.2015
Subjects
Hybrid
Quantum dots
Solar cells
Thin films
Solar cells
Thin films
Hybrid
Quantum dots
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Summary:Phase pure and well-dispersed FeS2 quantum dots (QDs) have been synthesized with a method combining hot-injection and solvothermal reaction at a relatively low temperature. Hybrid composites composed of organic semiconductor and FeS2 QDs effectively dissociates excitons at the donor–acceptor interface, which qualifies efficient bulk-heterojunction solar cells. It has been found that the photovoltaic performance depends greatly on different ways of ligands exchange. It shows that mercaptopropanoic acid (MPA) treated hybrid thin film performs better in solar cells efficiency than pyridine exchange treatment to as-synthesized FeS2 nanoparticles due to a suppressed current leakage. [Display omitted] •A new method has been developed to synthesize FeS2 QDs at a low temperature.•FeS2 QDs obtained in our work are well crystallized and monodispersed.•Photon-generated excitons are efficiently splitted at the polymer:FeS2 QDs interface.•MPA treatment to the hybrid thin film enables better photovoltaic performance.•Our reaction process is adaptable in synthesis of some other nanocrystals.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2015.05.033