scholarly journals Dual Role of Graphene Quantum Dots in Active Layer of Inverted Bulk Heterojunction Organic Photovoltaic Devices

ACS Omega ◽  
2019 ◽  
Vol 4 (14) ◽  
pp. 16159-16165
Author(s):  
Wentian Wu ◽  
Haixia Wu ◽  
Min Zhong ◽  
Shouwu Guo
Keyword(s):  
Quantum Dots ◽  
Active Layer ◽  
Bulk Heterojunction ◽  
Graphene Quantum Dots ◽  
Dual Role ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

Enhanced Performance from Acid Functionalised Multiwall Carbon Nanotubes in the Active Layer of Organic Bulk Heterojunction Solar Cells

2010 ◽  
Vol 1270 ◽  
Author(s):  
Nasrul Aamina Nismy ◽  
A.A. Damitha T Adikaari ◽  
Ravi Silva
Keyword(s):  
Carbon Nanotubes ◽  
Active Layer ◽  
Conjugated Polymer ◽  
Bulk Heterojunction ◽  
Multiwall Carbon Nanotubes ◽  
Organic Photovoltaic ◽  
Fullerene Derivative ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Multiwall Carbon

AbstractSolution-processable organic bulk-heterojunction photovoltaic devices have made great advances over the past decade. The concept, ultrafast photo induced electron transfer from a conjugated polymer to fullerene derivative molecules in bulk-heterojunction systems, leads to device efficiencies as high as 6%. Light absorption, charge separation and charge transport to electrodes are the most important steps in organic photovoltaic devices. The enhanced light absorption through thicker active layers results in more exciton creation, however, leads to increased recombination due to the relatively short exciton diffusion length. We fabricated poly(3-hexylthiophene)/ [6,6]-phenyl C61 butyric acid methyl ester bulk-heterojunction devices with multiwall carbon nanotubes in the active layer in a bid to address this deficiency. Functionalization of carbon nanotubes allows better dispersion in aromatic solvents, 1,2-dichlorobenzene in this study, and pristine multiwall nanotubes result in poorer dispersions. Organic photovoltaic devices fabricated with pristine multiwall carbon nanotubes in the active layer result in power conversion efficiencies ˜1.4%, which show localized nanotube-rich areas in the active layer. Alternatively, acid functionalized nanotubes in the active layer results in efficiencies as high as 2.2 % with no distinct nanotube-rich sectors. The open circuit voltages of the devices show a dependency on the loading of nanotubes in the active layer. Further, the shunt resistances of the devices with carbon nanotubes decrease, which needs careful selection of the tubes depending on active layer thickness. This work compares the device performances in detail and identifies further improvements to conjugated polymer/fullerene derivative/multiwall carbon nanotubes hybrid photovoltaic systems.

Fabrication and properties of a high-performance chlorine doped graphene quantum dot based photovoltaic detector

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 29222-29229 ◽  
Author(s):  
Jianhong Zhao ◽  
Libin Tang ◽  
Jinzhong Xiang ◽  
Rongbin Ji ◽  
Yanbo Hu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Active Material ◽  
Graphene Quantum Dots ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Graphene Quantum Dot ◽  
Doped Graphene ◽  
Photovoltaic Detector

The presence of chlorine doped graphene quantum dots (Cl-GQDs) in the active material can significantly enhance the performance of organic photovoltaic devices.

Luminscent Graphene Quantum Dots for Organic Photovoltaic Devices

2011 ◽  
Vol 133 (26) ◽  
pp. 9960-9963 ◽  
Author(s):  
Vinay Gupta ◽  
Neeraj Chaudhary ◽  
Ritu Srivastava ◽  
Gauri Datt Sharma ◽  
Ramil Bhardwaj ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

The critical role of interfacial dynamics in the stability of organic photovoltaic devices

2014 ◽  
Vol 16 (18) ◽  
pp. 8294-8300 ◽  
Author(s):  
G. Grancini ◽  
M. De Bastiani ◽  
N. Martino ◽  
D. Fazzi ◽  
H.-J. Egelhaaf ◽  
...  
Keyword(s):  
Active Layer ◽  
Critical Role ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Interfacial Dynamics ◽  
The Stability ◽  
Harmful Species

By combining optical and magnetic spectroscopy we found that the long-lived emissive interfacial CT state is responsible for the generation of reactive and harmful species, affecting the robustness of the photovoltaic active layer.

Vacuum-process-based dry transfer of active layer with solvent additive for efficient organic photovoltaic devices

2017 ◽  
Vol 5 (5) ◽  
pp. 1106-1112 ◽  
Author(s):  
Jong Hwa Lee ◽  
Kang Min Kim ◽  
Woongsik Jang ◽  
Sunyong Ahn ◽  
Young Yun Kim ◽  
...  
Keyword(s):  
Active Layer ◽  
Photovoltaic Cell ◽  
Cell Performance ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Organic Photovoltaic Cell ◽  
Long Term Stability ◽  
Solvent Additive

PTB7:PC71BM-based organic photovoltaic cell with solvent additive fabricated by transferring a BHJ layer via stamping transfer. This photovoltaic cell exhibited enhanced long-term stability and similar cell performance as compared with those of the spin-coated cells.

Role of humidity on indium and tin migration in organic photovoltaic devices

2011 ◽  
Vol 13 (10) ◽  
pp. 4381 ◽  
Author(s):  
Anirudh Sharma ◽  
Gunther Andersson ◽  
David A. Lewis
Keyword(s):  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

Effect of the π-linker on the performance of organic photovoltaic devices based on push–pull D–π–A molecules

2018 ◽  
Vol 42 (14) ◽  
pp. 11458-11464 ◽  
Author(s):  
Hong Chul Lim ◽  
Jang-Joo Kim ◽  
Jyongsik Jang ◽  
Jong-In Hong
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Higher Power

The bulk heterojunction organic photovoltaic (OPV) devices based on 3T : PC71BM (2 wt%, 1 : 1.75 w/w) exhibited a higher power conversion efficiency of 2.58% than DTT-based OPV devices.

scholarly journals Melt-processing of small molecule organic photovoltaics via bulk heterojunction compatibilization

2018 ◽  
Vol 20 (10) ◽  
pp. 2218-2224 ◽  
Author(s):  
Aiman Rahmanudin ◽  
Liang Yao ◽  
Xavier A. Jeanbourquin ◽  
Yongpeng Liu ◽  
Arvindh Sekar ◽  
...  
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Bulk Heterojunction ◽  
Melt Processing ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

A specially-designed molecular compatibilizer enables bulk-heterojunction organic photovoltaic devices that tolerate melt processing thus reducing the need for toxic solvents.

An easily prepared carbon quantum dots and employment for inverted organic photovoltaic devices

2017 ◽  
Vol 315 ◽  
pp. 621-629 ◽  
Author(s):  
Xinyuan Zhang ◽  
Chunyu Liu ◽  
Zhiqi Li ◽  
Jiaxin Guo ◽  
Liang Shen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices
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