scholarly journals Photoinduced degradation from trace 1,8-diiodooctane in organic photovoltaics

2018 ◽  
Vol 6 (2) ◽  
pp. 219-225 ◽  
Author(s):  
Ian E. Jacobs ◽  
Faustine Wang ◽  
Zaira I. Bedolla Valdez ◽  
Alejandra N. Ayala Oviedo ◽  
David J. Bilsky ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Organic Photovoltaic ◽  
Solvent Additive

Residual 1,8-Diiodooctane (DIO), a common solvent additive used in organic photovoltaic (OPV) films, is found to cause photodegradation even at ppm concentrations.

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.

Scattering Techniques for Mixed Donor-Acceptor Characterization in Organic Photovoltaics

2021 ◽  
Author(s):  
Thomas Chaney ◽  
Andrew Levin ◽  
Sebastian Schneider ◽  
Michael F. Toney
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Photovoltaics ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Organic Photovoltaic ◽  
Precise Control ◽  
Active Layers ◽  
Complex Morphology ◽  
Donor Acceptor

Precise control of the complex morphology of organic photovoltaic bulk heterojunction (BHJ) active layers remains an important yet challenging approach for improving power conversion efficiency. Of particular interest are the...

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.

Organic photovoltaic greenhouses: a unique application for semi-transparent PV?

2015 ◽  
Vol 8 (4) ◽  
pp. 1317-1328 ◽  
Author(s):  
Christopher J. M. Emmott ◽  
Jason A. Röhr ◽  
Mariano Campoy-Quiles ◽  
Thomas Kirchartz ◽  
Antonio Urbina ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Crop Growth ◽  
Organic Photovoltaic ◽  
Electricity Production ◽  
Unique Application

Organic photovoltaics are analysed for use within a photovoltaic greenhouse for combined crop growth and electricity production.

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.

Oxy phosphorus tetrabenzotriazacorrole: firming up the chemical structure and identifying organic photovoltaic functionality to leverage its unique dual absorbance

2017 ◽  
Vol 5 (22) ◽  
pp. 10978-10985 ◽  
Author(s):  
Hasan Raboui ◽  
Emmanuel S. Thibau ◽  
David S. Josey ◽  
Zheng-Hong Lu ◽  
Timothy P. Bender
Keyword(s):  
Organic Photovoltaics ◽  
Chemical Structure ◽  
Visible Spectrum ◽  
Organic Photovoltaic ◽  
Planar Heterojunction ◽  
First Time

Tetrabenzotriazacorroles are a family of molecules that exhibits dual absorbance in the visible spectrum. Here we identify their functionality in planar heterojunction organic photovoltaics for the first time.

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.

Developments of furan and benzodifuran semiconductors for organic photovoltaics

2015 ◽  
Vol 3 (12) ◽  
pp. 6244-6257 ◽  
Author(s):  
Peishen Huang ◽  
Jia Du ◽  
Michael C. Biewer ◽  
Mihaela C. Stefan
Keyword(s):  
Organic Photovoltaics ◽  
Building Blocks ◽  
Organic Photovoltaic ◽  
Photovoltaic Materials ◽  
Organic Photovoltaic Materials

This review describes the developments of organic photovoltaic materials containing furan or benzo[1,2-b:4,5-b′]difuran (BDF) building blocks.

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