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Issue 19, 2015
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All-solution-processed PbS quantum dot solar modules

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A rapid increase in power conversion efficiencies in colloidal quantum dot (QD) solar cells has been achieved recently with lead sulphide (PbS) QDs by adapting a heterojunction architecture, which consists of small-area devices associated with a vacuum-deposited buffer layer with metal electrodes. The preparation of QD solar modules by low-cost solution processes is required to further increase the power-to-cost ratio. Herein we demonstrate all-solution-processed flexible PbS QD solar modules with a layer-by-layer architecture comprising polyethylene terephthalate (PET) substrate/indium tin oxide (ITO)/titanium oxide (TiO2)/PbS QD/poly(3-hexylthiophene) (P3HT)/poly(3,4-ethylenedioxythiophene) : poly(styrene sulfonate) (PEDOT : PSS)/Ag, with an active area of up to 30 cm2, exhibiting a power conversion efficiency (PCE) of 1.3% under AM 1.5 conditions (PCE of 2.2% for a 1 cm2 unit cell). Our approach affords trade-offs between power and the active area of the photovoltaic devices, which results in a low-cost power source, and which is scalable to larger areas.

Graphical abstract: All-solution-processed PbS quantum dot solar modules

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The article was received on 08 Mar 2015, accepted on 07 Apr 2015 and first published on 13 Apr 2015

Article type: Paper
DOI: 10.1039/C5NR01508A
Citation: Nanoscale, 2015,7, 8829-8834
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    All-solution-processed PbS quantum dot solar modules

    J. Jang, H. C. Shim, Y. Ju, J. H. Song, H. An, J. Yu, S. Kwak, T. Lee, I. Kim and S. Jeong, Nanoscale, 2015, 7, 8829
    DOI: 10.1039/C5NR01508A

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