Indolo[3,2-b]carbazole and benzofurazan based narrow band-gap polymers for photovoltaic cells

Large band-gap copolymers based on 1,2,5,6-naphthalenediimide were developed for photovoltaic applications. A PCE of 6.35% was obtained by gradually optimizing the morphology of active layers.

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Theoretical Investigations of Polymer Based Solar Cells

MRS Proceedings ◽

10.1557/proc-822-s7.7 ◽

2004 ◽

Vol 822 ◽

Cited By ~ 1

Author(s):

Robert S. Echols ◽

Chris E. France

Keyword(s):

Solar Cells ◽

Solar Cell ◽

Band Gap ◽

Polymer Blend ◽

Bulk Heterojunction ◽

Power Conversion ◽

Normal Incidence ◽

Open Circuit ◽

Action Spectra ◽

Conversion Efficiencies

AbstractWe investigate the behavior of a polymer blend (M3EH-PPV:CN-ether-PPV) bulk heterojunction solar cell using a numeric model that self-consistently solves Poisson's equation and the charge continuity equation while incorporating electric field dependent mobilities. We obtain good quantitative agreement with present experimental data for J-V curves and photocurrent action spectra. To reproduce experimental photocurrent action spectra, our model predicts 36% exciton dissociation efficiencies in the bulk of the polymer. We also study the limiting conditions of polymer solar cell development by simulating an ideal solar cell using an AM1.5 global spectrum and assuming all absorbed photons hitting a M3EH-PPV:CN-ether-PPV polymer blend (band gap ∼2.0 eV) based solar cell at normal incidence contribute to current. If such a solar cell has 100 nm length, open circuit voltage=0.6 V and 50% fill factor, then the maximum theoretical power conversion efficiency is ηp=5.6%. A similar analysis for a M3EH-PPV:PCBM bulk heterojunction cell yields, ηp=3.5%. These results further highlight the need to develop smaller band gap materials and help explain why the best polymer based solar cells have power conversion efficiencies that remain stuck at about 3%. Our model is used to investigate the important increase in power conversion efficiencies we can expect as lower band gap polymers become available.

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Ternary organic solar cells: using molecular donor or acceptor third components to increase open circuit voltage

New Journal of Chemistry ◽

10.1039/c9nj01574d ◽

2019 ◽

Vol 43 (26) ◽

pp. 10442-10448 ◽

Cited By ~ 10

Author(s):

Sergey V. Dayneko ◽

Arthur D. Hendsbee ◽

Jonathan R. Cann ◽

Clément Cabanetos ◽

Gregory C. Welch

Keyword(s):

Solar Cells ◽

Organic Photovoltaics ◽

Organic Solar Cells ◽

Open Circuit Voltage ◽

Power Conversion ◽

Open Circuit ◽

Molecular Semiconductors ◽

Conversion Efficiencies ◽

Open Circuit Voltages

The addition of donor or acceptor type molecular semiconductors to PBDB-T:PC60BM based organic photovoltaics leads to increases in open circuit-voltages and overall power conversion efficiencies.

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High-performance wide-bandgap copolymers with dithieno[3,2-b:2′,3′-d]pyridin-5(4H)-one units

Materials Chemistry Frontiers ◽

10.1039/c8qm00604k ◽

2019 ◽

Vol 3 (3) ◽

pp. 399-402 ◽

Cited By ~ 10

Author(s):

Yaxin Gao ◽

Dan Li ◽

Zuo Xiao ◽

Xin Qian ◽

Junliang Yang ◽

...

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

High Performance ◽

Power Conversion ◽

Wide Bandgap ◽

Open Circuit ◽

Conversion Efficiencies ◽

Open Circuit Voltages

Dithieno[3,2-b:2′,3′-d]pyridin-5(4H)-one-based wide-bandgap copolymers gave high open-circuit voltages and decent power conversion efficiencies in nonfullerene organic solar cells.

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Enhanced open-circuit voltage in polymer solar cells by dithieno[3,2-b:2′,3′-d]pyrrole N-acylation

Journal of Materials Chemistry A ◽

10.1039/c4ta00525b ◽

2014 ◽

Vol 2 (20) ◽

pp. 7535-7545 ◽

Cited By ~ 25

Author(s):

Wouter Vanormelingen ◽

Jurgen Kesters ◽

Pieter Verstappen ◽

Jeroen Drijkoningen ◽

Julija Kudrjasova ◽

...

Keyword(s):

Solar Cells ◽

Open Circuit Voltage ◽

Polymer Solar Cells ◽

Power Conversion ◽

Open Circuit ◽

Higher Power ◽

Conversion Efficiencies ◽

Open Circuit Voltages

N-Acylation of dithieno[3,2-b:2′,3′-d]pyrrole (DTP) leads to enhanced open-circuit voltages and hence higher power conversion efficiencies in polymer solar cells.

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Synthesis and Photovoltaic Properties of Fluorene-Based Copolymers with Thiophene Heterocycle on the Side Chain

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.7677 ◽

2011 ◽

Vol 383-390 ◽

pp. 7677-7681

Author(s):

Qiong Hou ◽

Xiang Hua Zeng ◽

Xin Xu ◽

Ting Guo ◽

Hong Yu Zhen ◽

...

Keyword(s):

Band Gap ◽

Open Circuit Voltage ◽

Narrow Band ◽

Power Conversion ◽

Open Circuit ◽

Side Chain ◽

Photovoltaic Properties ◽

Coupling Methods ◽

Electrode Interface ◽

Hetero Cycle

High molecular weight, readily soluable copolymer was prepared from 9,9-di (2-thienyl-hexyl) fluorene (TF) 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-di octyl fluorene and narrow band gap comonomer 2,3-dimethyl- 5,8-(5-bromo)-dithien-2-yl-quinoxalines (DTQU) using pallad- ium catalyzed Suzuki coupling methods. To compare the copolymer to this without thiophene in the C9 side chain of fluorene, the copolymer from DOF and DTQU was synthesized. The electrochemical, optical and photovoltaic properties of the copolymers were studied. The absorption spectra of the copolymers measured in thin films display two absorption peaks. The power conversion efficiency achieved in the device configuration ITO/PEDT/FT- DTQU:PCBM (1:2)/Al is 0.85% with open-circuit voltage (Voc) 0.8V. Further improvement by manipulating polymer/electrode interface and further investigation of more polyfluorene copolymers with narrow band gap aryl-hetero cycle units on the side chain is in progress.

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Micro-sized thin-film solar cells via area-selective electrochemical deposition for concentrator photovoltaics application

Scientific Reports ◽

10.1038/s41598-020-71717-0 ◽

2020 ◽

Vol 10 (1) ◽

Cited By ~ 1

Author(s):

Daniel Siopa ◽

Khalil El Hajraoui ◽

Sara Tombolato ◽

Finn Babbe ◽

Alberto Lomuscio ◽

...

Keyword(s):

Solar Cells ◽

Concentration Factor ◽

Power Conversion ◽

Open Circuit ◽

Photovoltaic Devices ◽

Large Area ◽

Higher Power ◽

Light Concentration ◽

Conversion Efficiencies ◽

Open Circuit Voltages

Abstract Micro-concentrator solar cells enable higher power conversion efficiencies and material savings when compared to large-area non-concentrated solar cells. In this study, we use materials-efficient area-selective electrodeposition of the metallic elements, coupled with selenium reactive annealing, to form Cu(In,Ga)Se2 semiconductor absorber layers in patterned microelectrode arrays. This process achieves significant material savings of the low-abundance elements. The resulting copper-poor micro-absorber layers’ composition and homogeneity depend on the deposition charge, where higher charge leads to greater inhomogeneity in the Cu/In ratio and to a patchy presence of a CuIn5Se8 OVC phase. Photovoltaic devices show open-circuit voltages of up to 525 mV under a concentration factor of 18 ×, which is larger than other reported Cu(In,Ga)Se2 micro-solar cells fabricated by materials-efficient methods. Furthermore, a single micro-solar cell device, measured under light concentration, displayed a power conversion efficiency of 5% under a concentration factor of 33 ×. These results show the potential of the presented method to assemble micro-concentrator photovoltaic devices, which operate at higher efficiencies while using light concentration.

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A Partially-Planarised Hole-Transporting Quart-p-Phenylene for Perovskite Solar Cells

10.26434/chemrxiv.7770368 ◽

2019 ◽

Author(s):

Juan P. Mora-Fuentes ◽

Diego Cortizo-Lacalle ◽

Silvia Collavini ◽

Karol Strutyński ◽

Wolfgang R. Tress ◽

...

Keyword(s):

Short Circuit ◽

Energy Levels ◽

Power Conversion ◽

Perovskite Solar Cells ◽

Open Circuit ◽

Hole Transporting ◽

Hole Transporting Material ◽

Conversion Efficiencies ◽

Open Circuit Voltages ◽

Short Circuit Currents

<div><div><div><p>Herein, we describe the synthesis of a hole transporting material based on a partially planarised quart-p-phenylene core incorporating tetraketal and diphenylamine substituents that show optimal energy levels and solubility for perovskite solar cell applications. Triple-cation perovskite devices incorporating such quart-p-phenylene derivative show power-conversion efficiencies, short circuit currents, open circuit voltages, and fill factors that are comparable to those of spiro-OMeTAD.</p></div></div></div>

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A Partially-Planarised Hole-Transporting Quart-p-Phenylene for Perovskite Solar Cells

10.26434/chemrxiv.7770368.v1 ◽

2019 ◽

Author(s):

Juan P. Mora-Fuentes ◽

Diego Cortizo-Lacalle ◽

Silvia Collavini ◽

Karol Strutyński ◽

Wolfgang R. Tress ◽

...

Keyword(s):

Short Circuit ◽

Energy Levels ◽

Power Conversion ◽

Perovskite Solar Cells ◽

Open Circuit ◽

Hole Transporting ◽

Hole Transporting Material ◽

Conversion Efficiencies ◽

Open Circuit Voltages ◽

Short Circuit Currents

<div><div><div><p>Herein, we describe the synthesis of a hole transporting material based on a partially planarised quart-p-phenylene core incorporating tetraketal and diphenylamine substituents that show optimal energy levels and solubility for perovskite solar cell applications. Triple-cation perovskite devices incorporating such quart-p-phenylene derivative show power-conversion efficiencies, short circuit currents, open circuit voltages, and fill factors that are comparable to those of spiro-OMeTAD.</p></div></div></div>

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Synthesis, optoelectronic properties and photovoltaic performances of wide band-gap copolymers based on dibenzosilole and quinoxaline units, rivals to P3HT

Polymer Chemistry ◽

10.1039/c6py00370b ◽

2016 ◽

Vol 7 (25) ◽

pp. 4160-4175 ◽

Cited By ~ 16

Author(s):

F. Caffy ◽

N. Delbosc ◽

P. Chávez ◽

P. Lévêque ◽

J. Faure-Vincent ◽

...

Keyword(s):

Solar Cells ◽

Band Gap ◽

Bulk Heterojunction ◽

Power Conversion ◽

Wide Band ◽

Optoelectronic Properties ◽

Wide Band Gap ◽

Heterojunction Solar Cells ◽

Bulk Heterojunction Solar Cells ◽

Conversion Efficiencies

Dibenzosilole and quinoxaline based copolymers were synthesized and tested in bulk-heterojunction solar cells showing power conversion efficiencies up to 5.14%.

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