Improving the Photocurrent in Quantum-Dot-Sensitized Solar Cells by Employing Alloy PbxCd1-xS Quantum Dots as Photosensitizers
2016 (English)In: NANOMATERIALS, ISSN 2079-4991, Vol. 6, no 6, UNSP 97Article in journal (Refereed) PublishedText
Ternary alloy PbxCd1-xS quantum dots (QDs) were explored as photosensitizers for quantum-dot-sensitized solar cells (QDSCs). Alloy PbxCd1-xS QDs (Pb0.54Cd0.46S, Pb0.31Cd0.69S, and Pb0.24Cd0.76S) were found to substantially improve the photocurrent of the solar cells compared to the single CdS or PbS QDs. Moreover, it was found that the photocurrent increases and the photovoltage decreases when the ratio of Pb in PbxCd1-xS is increased. Without surface protecting layer deposition, the highest short-circuit current density reaches 20 mA/cm(2) under simulated AM 1.5 illumination (100 mW/cm(2)). After an additional CdS coating layer was deposited onto the PbxCd1-xS electrode, the photovoltaic performance further improved, with a photocurrent of 22.6 mA/cm(2) and an efficiency of 3.2%.
Place, publisher, year, edition, pages
MDPI AG , 2016. Vol. 6, no 6, UNSP 97
quantum dot-sensitized solar cells, photocurrent, alloy, PbS
IdentifiersURN: urn:nbn:se:kth:diva-189945DOI: 10.3390/nano6060097ISI: 000378806100003ScopusID: 2-s2.0-84973909653OAI: oai:DiVA.org:kth-189945DiVA: diva2:950173
QC 201607282016-07-282016-07-252016-07-28Bibliographically approved