Ultrafast electron transfer from low band gap conjugated polymer to quantum dots in hybrid photovoltaic materials

2014 ◽  
Author(s):  
Elsa Couderc ◽  
Matthew J. Greaney ◽  
William Thornbury ◽  
Richard L. Brutchey ◽  
Stephen E. Bradforth
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Band Gap ◽  
Conjugated Polymer ◽  
Low Band Gap ◽  
Photovoltaic Materials ◽  
Ultrafast Electron Transfer

Ultrafast Electron Transfer in Low-Band Gap Polymer/PbS Nanocrystalline Blend Films

2015 ◽  
Vol 26 (5) ◽  
pp. 713-721 ◽  
Author(s):  
Wenping Guo ◽  
Jianyu Yuan ◽  
Haochen Yuan ◽  
Feng Jin ◽  
Lu Han ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Band Gap ◽  
Low Band Gap ◽  
Blend Films ◽  
Low Band Gap Polymer ◽  
Ultrafast Electron Transfer

Low band gap-conjugated polymer derivatives

2005 ◽  
Vol 155 (3) ◽  
pp. 618-622 ◽  
Author(s):  
Chun-Guey Wu ◽  
Chnug-Wei Hsieh ◽  
Ding-Chou Chen ◽  
Shinn-Jen Chang ◽  
Kuo-Yu Chen
Keyword(s):  
Band Gap ◽  
Conjugated Polymer ◽  
Low Band Gap

A Low Band Gap Conjugated Polymer for Supercapacitor Devices†

2006 ◽  
Vol 110 (44) ◽  
pp. 22202-22206 ◽  
Author(s):  
Filippo Marchioni ◽  
Jian Yang ◽  
Wesley Walker ◽  
Fred Wudl
Keyword(s):  
Band Gap ◽  
Conjugated Polymer ◽  
Low Band Gap

Low Band Gap Donor-Acceptor Conjugated Polymer Nanoparticles and their NIR-mediated Thermal Ablation of Cancer Cells

2012 ◽  
Vol 13 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Christopher M. MacNeill ◽  
Robert C. Coffin ◽  
David L. Carroll ◽  
Nicole H. Levi-Polyachenko
Keyword(s):  
Band Gap ◽  
Cancer Cells ◽  
Conjugated Polymer ◽  
Thermal Ablation ◽  
Polymer Nanoparticles ◽  
Low Band Gap ◽  
Donor Acceptor ◽  
Conjugated Polymer Nanoparticles

Electrosynthesis of a Low Band Gap π-Conjugated Polymer from a Multibridged Dithienylethylene

1998 ◽  
Vol 63 (20) ◽  
pp. 7107-7110 ◽  
Author(s):  
Philippe Blanchard ◽  
Amédée Riou ◽  
Jean Roncali
Keyword(s):  
Band Gap ◽  
Conjugated Polymer ◽  
Low Band Gap

Synthesis and Electron Transfer Characteristics of a Neutral, Low-Band-Gap, Mixed-Valence Polyradical

2010 ◽  
Vol 22 (24) ◽  
pp. 6641-6655 ◽  
Author(s):  
Dörte Reitzenstein ◽  
Tatjana Quast ◽  
Florian Kanal ◽  
Martin Kullmann ◽  
Stefan Ruetzel ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Band Gap ◽  
Mixed Valence ◽  
Low Band Gap ◽  
Transfer Characteristics

A novel low band gap conjugated polymer based on N-substituted dithieno[3,2-b:2′,3′-d]pyrrole

2010 ◽  
Vol 160 (13-14) ◽  
pp. 1438-1441 ◽  
Author(s):  
Yong Lu ◽  
Hui Chen ◽  
Xiaoya Hou ◽  
Xiao Hu ◽  
Siu-Choon Ng
Keyword(s):  
Band Gap ◽  
Conjugated Polymer ◽  
Low Band Gap

scholarly journals Ultrafast Charge and Triplet State Formation in Diketopyrrolopyrrole Low Band Gap Polymer/Fullerene Blends: Influence of Nanoscale Morphology of Organic Photovoltaic Materials on Charge Recombination to the Triplet State

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
René M. Williams ◽  
Hung-Cheng Chen ◽  
Daniele Di Nuzzo ◽  
Stephan C. J. Meskers ◽  
René A. J. Janssen
Keyword(s):  
Triplet State ◽  
Band Gap ◽  
State Formation ◽  
Laser Fluence ◽  
Charge Recombination ◽  
Organic Photovoltaic ◽  
Low Band Gap ◽  
Photovoltaic Materials ◽  
Organic Photovoltaic Materials ◽  
Low Band Gap Polymer

Femtosecond transient absorption spectroscopy of thin films of two types of morphologies of diketopyrrolopyrrole low band gap polymer/fullerene-adduct blends is presented and indicates triplet state formation by charge recombination, an important loss channel in organic photovoltaic materials. At low laser fluence (approaching solar intensity) charge formation characterized by a 1350 nm band (in ~250 fs) dominates in the two PDPP-PCBM blends with different nanoscale morphologies and these charges recombine to form a local polymer-based triplet state on the sub-ns timescale (in ~300 and ~900 ps) indicated by an 1100 nm absorption band. The rate of triplet state formation is influenced by the morphology. The slower rate of charge recombination to the triplet state (in ~900 ps) belongs to a morphology that results in a higher power conversion efficiency in the corresponding device. Nanoscale morphology not only influences interfacial area and conduction of holes and electrons but also influences the mechanism of intersystem crossing (ISC). We present a model that correlates morphology to the exchange integral and fast and slow mechanisms for ISC (SOCT-ISC and H-HFI-ISC). For the pristine polymer, a flat and unstructured singlet-singlet absorption spectrum (between 900 and 1400 nm) and a very minor triplet state formation (5%) are observed at low laser fluence.

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