scholarly journals Organic Photovoltaics: Direct Free Carrier Photogeneration in Single Layer and Stacked Organic Photovoltaic Devices (Adv. Mater. 22/2017)

2017 ◽  
Vol 29 (22) ◽  
Author(s):  
Hrisheekesh Thachoth Chandran ◽  
Tsz-Wai Ng ◽  
Yishu Foo ◽  
Ho-Wa Li ◽  
Jian Qing ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Single Layer ◽  
Free Carrier ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

Direct Free Carrier Photogeneration in Single Layer and Stacked Organic Photovoltaic Devices

2017 ◽  
Vol 29 (22) ◽  
pp. 1606909 ◽  
Author(s):  
Hrisheekesh Thachoth Chandran ◽  
Tsz-Wai Ng ◽  
Yishu Foo ◽  
Ho-Wa Li ◽  
Jian Qing ◽  
...  
Keyword(s):  
Single Layer ◽  
Free Carrier ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic 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.

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 Free Charge Photogeneration in a Single Component High Photovoltaic Efficiency Organic Semiconductor

2021 ◽  
Author(s):  
Justin Hodgkiss ◽  
Michael Price ◽  
Paul Hume ◽  
Aleksandra Ilina ◽  
Isabella Wagner ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Organic Photovoltaics ◽  
Photovoltaic Cells ◽  
Single Component ◽  
Dielectric Constants ◽  
Organic Photovoltaic ◽  
Free Charge ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Charge Generation

Abstract Organic photovoltaic cells promise cheap, flexible and scalable solar energy. Whereas light directly generates free charges in silicon photovoltaic cells, bound electron and hole pairs known as excitons are understood to be the primary excitations in organic semiconductors due to their low dielectric constants. These excitons must then be split apart at molecular heterojunctions in order to extract current. Recent record efficiency organic photovoltaics utilise the small molecule, Y6, as a key component in the photon-absorbing blend layer. This molecule and its analogues – unlike previous organic semiconductors – have both low band-gaps and high dielectric constants. Here we show that, in a neat film of Y6, these factors lead to intrinsic free charge generation without the need for a molecular heterojunction to split the exciton. We use a suite of intensity-dependent optical spectroscopy measurements to show that a significant (20-90%) fraction of free charges exist in equilibrium with bound states at light intensity equivalent to 1 sun. Rapid bimolecular charge recombination constrains single component Y6 organic photovoltaic devices to low efficiencies, but this recombination is reduced by the introduction of small quantities of donor polymer. Quantum-chemical calculations reveal charge generation pathways through strong coupling between exciton and CT states, and an intermolecular polarisation pattern that drives exciton dissociation. Our results challenge the understanding of how current record efficiency organic photovoltaics operate, and point towards new future possibilities – offering a molecular picture of intrinsic charge generation as a platform to improve charge yields, and renewing the possibility of efficient single-component organic photovoltaic devices.

scholarly journals Copper light-catching electrodes for organic photovoltaics

2017 ◽  
Vol 1 (4) ◽  
pp. 859-865 ◽  
Author(s):  
H. Jessica Pereira ◽  
Oliver S. Hutter ◽  
G. Dinesha M. R. Dabera ◽  
Luke A. Rochford ◽  
Ross. A. Hatton
Keyword(s):  
Organic Photovoltaics ◽  
Red Light ◽  
Organic Photovoltaic ◽  
Copper Films ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Photoactive Layer

Plasmon-active optically thin copper films catch red light and transfer the energy to the photoactive layer in organic photovoltaic devices.

The role of surface energy control in organic photovoltaics based on solar paints

2019 ◽  
Vol 7 (15) ◽  
pp. 9202-9214 ◽  
Author(s):  
Furqan Almyahi ◽  
Thomas R. Andersen ◽  
Adam Fahy ◽  
Michael Dickinson ◽  
Krishna Feron ◽  
...  
Keyword(s):  
Surface Energy ◽  
Organic Photovoltaics ◽  
Emulsion Stability ◽  
Surface Wettability ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Energy Control

The fabrication of organic photovoltaic devices from aqueous solar nanoparticle (ASNP) inks or solar paints is challenging, driven by the often competing requirements of maintaining emulsion stability whilst simultaneously facilitating surface wettability.

scholarly journals cis-1 Isomers of tethered bismethano[70]fullerene as electron acceptors in organic photovoltaics

RSC Advances ◽  
2018 ◽  
Vol 8 (33) ◽  
pp. 18316-18326 ◽  
Author(s):  
Tomokazu Umeyama ◽  
Shogo Takahara ◽  
Sho Shibata ◽  
Kensho Igarashi ◽  
Tomohiro Higashino ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Electron Acceptors ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
First Time

cis-1 Isomers of [70]fullerene bis-adducts were utilized as electron-acceptors in organic photovoltaic devices for the first time.

Improving the efficiency of organic photovoltaics by tuning the work function of graphene oxide hole transporting layers

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6925-6931 ◽  
Author(s):  
Emmanuel Stratakis ◽  
Kyriaki Savva ◽  
Dimitrios Konios ◽  
Constantinos Petridis ◽  
Emmanuel Kymakis
Keyword(s):  
Graphene Oxide ◽  
Work Function ◽  
Organic Photovoltaics ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Highly Efficient ◽  
Hole Transporting

Photochlorinated graphene oxide with an increased work function of 5.23 eV as a hole transporting layer in highly efficient organic photovoltaic devices.

The synthesis, structure, and properties of 5,6,11,12-tetraarylindeno[1,2-b]fluorenes and their applications as donors for organic photovoltaic devices

2017 ◽  
Vol 4 (5) ◽  
pp. 675-681 ◽  
Author(s):  
Yuan-Chih Lo ◽  
Hao-Chun Ting ◽  
Ya-Ze Li ◽  
Yi-Hua Li ◽  
Shun-Wei Liu ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Electron Donors ◽  
Organic Photovoltaic ◽  
Structure And Properties ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
X Ray

Three new highly twisted 5,6,11,12-tetraarylindeno[1,2-b]fluorenes have been synthesized, characterized with X-ray analysis, and utilized as electron donors in organic photovoltaics.

Organic photovoltaic devices with a single layer geometry (Conference Presentation)

2016 ◽  
Author(s):  
Vladimir A. Kolesov ◽  
Canek Fuentes-Hernandez ◽  
Naoya Aizawa ◽  
Felipe A. Larrain ◽  
Wen-Fang Chou ◽  
...  
Keyword(s):  
Single Layer ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices
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