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Enhancement of recombination process using silver and graphene quantum dot embedded intermediate layer for efficient organic tandem cells.

Abstract：

:High performance of organic tandem solar cell is largely dependent on transparent and conductive intermediate layer (IML). The current work reports the design and fabrication of an IML using a simple solution process. The efficiency of a homo-tandem device with poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester as an active layer and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/poly(ethylenimine) as an IML was initially found to be 3.40%. Further enhancement of the cell efficiency was achieved using silver nanoparticles (Ag-NPs) of different sizes and graphene quantum dot embedded IML. A maximum efficiency of 4.03% was achieved using 7 nm Ag-NPs that contribute to a better recombination process. Also, the performance of the tandem cell was solely based on the electrical improvements indicated by the current - voltage measurements, external quantum efficiency and impedance analysis. The use of Ag-NPs in the IML has been shown to lengthen the life time of electron-hole pairs in the device. This study thus paves way to develop such efficient IMLs for more efficient tandem solar cells.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Ho NT,Tien HN,Jang SJ,Senthilkumar V,Park YC,Cho S,Kim YS

doi

10.1038/srep30327

subject

Has Abstract

pub_date

2016-07-25 00:00:00

pages

30327

issn

2045-2322

pii

srep30327

journal_volume

6

pub_type

杂志文章

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