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 Active Layer Thickness on Open Circuit Voltage in Organic Photovoltaic Devices

2009 ◽  
Vol 48 (12) ◽  
pp. 121501 ◽  
Author(s):  
Pankaj Kumar ◽  
Hemant Kumar ◽  
S. C. Jain ◽  
P. Venkatesu ◽  
Suresh Chand ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Active Layer ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Active Layer Thickness ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

Perylene bisimide as the cathode modifier in organic photovoltaics: the role of aggregation morphology on the interlayer performance

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 39973-39977 ◽  
Author(s):  
Wenqiang Zhang ◽  
Shu Zhong ◽  
Li Nian ◽  
Yulan Chen ◽  
Zengqi Xie ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Organic Photovoltaic ◽  
Device Performance ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Perylene Bisimide ◽  
Perylene Bisimides ◽  
Cathode Interlayer

Nanorods and nanoparticles of perylene bisimides (PBI-1) were prepared and applied as cathode interlayer in organic photovoltaic devices. The device performance showed important relation with the morphology of the interlayer.

scholarly journals The Promotion of the Efficiency of Organic Photovoltaic Devices by Addition of Anisotropic CdSe Nanocrystals

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Shu-Ru Chung ◽  
Hong-Shuo Chen ◽  
Chen-Yu Chien ◽  
Meng-Yi Bai ◽  
Kuan-Wen Wang
Keyword(s):  
Active Layer ◽  
Acid Methyl Ester ◽  
Organic Photovoltaic ◽  
Cdse Nanocrystals ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Acid Methyl ◽  
Seed Growth ◽  
Growth Method ◽  
Butyric Acid Methyl Ester

CdSe nanocrystals (NCs) with different morphologies have been synthesized and applied as the acceptor in the active layer of the organic photovoltaic (OPV) devices. CdSe tetrapod (TP)/nanorod (NR) with zinc-blended seeds and wurtzite arms is prepared by seed growth method and mixed with poly(3-hexylthiophene) (P3HT): [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). When the concentrations of CdSe in P3HT: PCBM system are 50 wt% optimally, the efficiency can be promoted about 4.3%, suggesting that an enhancement of 13.2% can be obtained and the addition of anisotropic CdSe NCs content in the active layer can be beneficial for the transport of electrons and light absorption in the OPV 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.

scholarly journals Impact of substituents on the performance of small-molecule semiconductors in organic photovoltaic devices via regulating morphology

2022 ◽  
Author(s):  
Mitsuharu Suzuki ◽  
Kanta Suzuki ◽  
Taehyun Won ◽  
Hiroko Yamada
Keyword(s):  
Organic Semiconductors ◽  
Active Layer ◽  
Small Molecule ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Photovoltaic Applications

This review summarizes recent prominent examples of substituent engineering on small-molecule organic semiconductors for photovoltaic applications, focusing on flexible substituents that regulate the active-layer morphology.

Optical and Electrical Modeling of Polymer Thin-film Photovoltaics

2010 ◽  
Vol 1270 ◽  
Author(s):  
Wenjun Jiang ◽  
Scott T Dunham
Keyword(s):  
Active Layer ◽  
Electronic Device ◽  
Organic Photovoltaic ◽  
Optical Simulation ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Matrix Solution ◽  
Polymer Thin Film ◽  
Optical Generation ◽  
Thin Film Photovoltaics

AbstractBy coupling optical and electronic device simulation, we explore the optimization of organic photovoltaic devices. We use optical simulation via FDTD and transmission matrix solution of Maxwell's equations in order to calculate distribution of light intensity, including the reflectivity and transmissivity of transparent anode layers. We derive simple formulas for the conductivity requirements as function of pattern structure of potential replacements for ITO as transparent anode material, and explore the optimization of thickness of active layer and its relationship with the peaks of optical generation inside the active layer.

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