Photon energy transfer by quantum dots in organic–inorganic hybrid solar cells through FRET

Organic-inorganic hybrid solar cells were fabricated with InP QDs (5 wt%) in a BHJ active layer (PTB7 + PC sub(71)BM). InP QDs were distributed on the top of the hybrid active layer (BHJ + QDs), determined through XPS depth profiling and AFM analyses. InP QDs showed strong emission characteristics a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2016-01, Vol.4 (27), p.10444-10453
Main Authors: Han, Yong Woon, Lee, Eui Jin, Joo, Jinwhan, Park, Jongnam, Sung, Tae Hyun, Moon, Doo Kyung
Format: Article
Language:English
Subjects:
Devices
Energy transfer
Fretting
Indium phosphides
Interlayers
Photovoltaic cells
Quantum dots
Solar cells
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Organic-inorganic hybrid solar cells were fabricated with InP QDs (5 wt%) in a BHJ active layer (PTB7 + PC sub(71)BM). InP QDs were distributed on the top of the hybrid active layer (BHJ + QDs), determined through XPS depth profiling and AFM analyses. InP QDs showed strong emission characteristics at lambda sub(max) = 650 nm in the PL spectra. They played an important role in increasing J sub(sc) by Forster resonance energy transfer (FRET) to PTB7. The carrier recombination of the hybrid active layer (BHJ + QDs) was reduced by morphology control through introducing a PFN interlayer. The carrier mobility of the device with the hybrid active layer (BHJ + QDs) increased 1.5-1.58 times over that of the device with the BHJ active layer. By means of the synergy effect of InP QDs and the PFN interlayer, the PCE of the fabricated hybrid solar cells was enhanced from 4.9% (J sub(sc) = 13.2 mA cm super(-2), FF = 60.0%) to 8.4% (J sub(sc) = 14.5 mA cm super(-2), FF = 72.5%).
ISSN:2050-7488
2050-7496
DOI:10.1039/c6ta02523d