Delayed Luminescence Spectroscopy of Organic Photovoltaic Binary Blend Films: Probing the Emissive Non-geminate Charge Recombination

2010 ◽  
Vol 22 (45) ◽  
pp. 5183-5187 ◽  
Author(s):  
Panagiotis E. Keivanidis ◽  
Valentin Kamm ◽  
Clare Dyer-Smith ◽  
Weimin Zhang ◽  
Frédéric Laquai ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Organic Photovoltaic ◽  
Luminescence Spectroscopy ◽  
Delayed Luminescence ◽  
Binary Blend ◽  
Blend Films

Correlating Emissive Non-Geminate Charge Recombination with Photocurrent Generation Efficiency in Polymer/Perylene Diimide Organic Photovoltaic Blend Films

2012 ◽  
Vol 22 (11) ◽  
pp. 2318-2326 ◽  
Author(s):  
Panagiotis E. Keivanidis ◽  
Valentin Kamm ◽  
Weimin Zhang ◽  
George Floudas ◽  
Frédéric Laquai ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Perylene Diimide ◽  
Organic Photovoltaic ◽  
Generation Efficiency ◽  
Blend Films ◽  
Photocurrent Generation

scholarly journals Afterglow Effects as a Tool to Screen Emissive Nongeminate Charge Recombination Processes in Organic Photovoltaic Composites

2019 ◽  
Vol 12 (2) ◽  
pp. 2695-2707 ◽  
Author(s):  
Panagiotis E. Keivanidis ◽  
Grigorios Itskos ◽  
Zhipeng Kan ◽  
Eduardo Aluicio-Sarduy ◽  
Hossein Goudarzi ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Organic Photovoltaic ◽  
Recombination Processes

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.

Fusion of thienyl into the backbone of electron acceptor in organic photovoltaic heterojunctions: a comparative study of BTPT-4F and BTPTT-4F

2020 ◽  
Vol 44 (14) ◽  
pp. 5224-5234 ◽  
Author(s):  
Rui-Rong Bai ◽  
Cai-Rong Zhang ◽  
You-Zhi Wu ◽  
Mei-Ling Zhang ◽  
Yu-Hong Chen ◽  
...  
Keyword(s):  
Comparative Study ◽  
Electron Acceptor ◽  
Recombination Rate ◽  
Charge Recombination ◽  
Organic Photovoltaic ◽  
Significant Suppression ◽  
Donor Acceptor

The fusion of thiophene into a non-fullerene acceptor backbone causes significant suppression of the charge recombination rate at the donor/acceptor heterojunction interface.

Role of transition metal oxides in the charge recombination layer used in tandem organic photovoltaic cells

2012 ◽  
Vol 22 (13) ◽  
pp. 6285 ◽  
Author(s):  
Jian Li ◽  
Qin-Ye Bao ◽  
Huai-Xin Wei ◽  
Zai-Quan Xu ◽  
Jin-Peng Yang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Photovoltaic Cells ◽  
Charge Recombination ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells

Hole mobility in optimized organic photovoltaic blend films obtained using extraction current transients

2009 ◽  
Vol 10 (8) ◽  
pp. 1615-1620 ◽  
Author(s):  
Ankit Kumar ◽  
Hua-Hsien Liao ◽  
Yang Yang
Keyword(s):  
Hole Mobility ◽  
Organic Photovoltaic ◽  
Blend Films ◽  
Current Transients

Charge Recombination in Organic Photovoltaic Devices with High Open-Circuit Voltages

2008 ◽  
Vol 130 (41) ◽  
pp. 13653-13658 ◽  
Author(s):  
Sebastian Westenhoff ◽  
Ian A. Howard ◽  
Justin M. Hodgkiss ◽  
Kiril R. Kirov ◽  
Hugo A. Bronstein ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Open Circuit Voltages
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