Development of naphthalene and quinoxaline-based donor-acceptor conjugated copolymers for delivering high open-circuit voltage in photovoltaic devices

2013 ◽  
Vol 51 (8) ◽  
pp. 1843-1851 ◽  
Author(s):  
Myung-Jin Baek ◽  
Hanok Park ◽  
Pranabesh Dutta ◽  
Woo-Hyung Lee ◽  
In-Nam Kang ◽  
...  
Keyword(s):  
Open Circuit Voltage ◽  
Open Circuit ◽  
Photovoltaic Devices ◽  
Donor Acceptor ◽  
Conjugated Copolymers

scholarly journals Synthesis and Photovoltaic Effect of Electron-Withdrawing Units for Low Band Gap Conjugated Polymers Bearing Bi(thienylenevinylene) Side Chains

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1461 ◽  
Author(s):  
Jianfeng Li ◽  
Yufei Wang ◽  
Ningning Wang ◽  
Zezhou Liang ◽  
Xu Wang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Open Circuit Voltage ◽  
Photovoltaic Effect ◽  
Photovoltaic Performance ◽  
Hole Mobility ◽  
Open Circuit ◽  
Photovoltaic Devices ◽  
Good Thermal Stability ◽  
Highest Occupied Molecular Orbital ◽  
Donor Acceptor

A novel (E)-5-(2-(5-alkylthiothiophen-2-yl)vinyl)thien-2-yl (TVT)-comprising benzo[1,2-b:4,5-b’]dithiophene (BDT) derivative (BDT-TVT) was designed and synthetized to compose two donor-acceptor (D-A) typed copolymers (PBDT-TVT-ID and PBDT-TVT-DTNT) with the electron-withdrawing unit isoindigo (ID) and naphtho[1,2-c:5,6-c′]bis[1,2,5]thiadiazole (NT), respectively. PBDT-TVT-ID and PBDT-TVT-DTNT showed good thermal stability (360 °C), an absorption spectrum from 300 nm to 760 nm and a relatively low lying energy level of Highest Occupied Molecular Orbital (EHOMO) (−5.36 to –5.45 eV), which could obtain a large open-circuit voltage (Voc) from photovoltaic devices with PBDT-TVT-ID or PBDT-TVT-DTNT. The photovoltaic devices with ITO/PFN/polymers: PC71BM/MoO3/Ag structure were assembled and exhibited a good photovoltaic performance with a power conversion efficiency (PCE) of 4.09% (PBDT-TVT-ID) and 5.44% (PBDT-TVT-DTNT), respectively. The best PCE of a PBDT-TVT-DTNT/PC71BM-based device mainly originated from its wider absorption, higher hole mobility and favorable photoactive layer morphology.

HOMO energy level regulation of novel conjugated copolymers for polymer solar cells

2015 ◽  
Vol 39 (8) ◽  
pp. 6548-6554 ◽  
Author(s):  
Jianfeng Zhang ◽  
Sheyu Wang ◽  
Qida Liu ◽  
Zhiyang Liu ◽  
Ruixiang Peng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Open Circuit Voltage ◽  
Polymer Solar Cells ◽  
Open Circuit ◽  
Spectral Absorption ◽  
Homo Energy ◽  
Donor Acceptor ◽  
Homo Energy Level ◽  
Conjugated Copolymers

Novel donor–acceptor conjugated copolymers were synthesized, and the HOMOs were regulated to high open circuit voltage and wide spectral absorption.

scholarly journals Silicon Phthalocyanines as Acceptor Candidates in Mixed Solution/Evaporation Processed Planar Heterojunction Organic Photovoltaic Devices

Coatings ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 203 ◽  
Author(s):  
Marie Faure ◽  
Trevor Grant ◽  
Benoît Lessard
Keyword(s):  
Fill Factor ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Mixed Solution ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Silicon Phthalocyanines ◽  
Donor Acceptor ◽  
Planar Heterojunction ◽  
Silicon Phthalocyanine

Silicon phthalocyanines (SiPc) are showing promise as both ternary additives and non-fullerene acceptors in organic photovoltaics (OPVs) as a result of their ease of synthesis, chemical stability and strong absorption. In this study, bis(3,4,5-trifluorophenoxy) silicon phthalocyanine ((345F)2-SiPc)) and bis(2,4,6-trifluorophenoxy) silicon phthalocyanine ((246F)2-SiPc)) are employed as acceptors in mixed solution/evaporation planar heterojunction (PHJ) devices. The donor layer, either poly(3-hexylthiophene) (P3HT) or poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT), was spin coated followed by the evaporation of the SiPc acceptor thin film. Several different donor/acceptor combinations were investigated in addition to investigations to determine the effect of film thickness on device performance. Finally, the effects of annealing, prior to SiPc deposition, after SiPc deposition, and during SiPc deposition were also investigated. The devices which performed the best were obtained using PCDTBT as the donor, with a 90 nm film of (345F)2-SiPc as the acceptor, followed by thermal annealing at 150 °C for 30 min of the entire mixed solution/evaporation device. An open-circuit voltage (Voc) of 0.88 V and a fill factor (FF) of 0.52 were achieved leading to devices that outperformed corresponding fullerene-based PHJ devices.

scholarly journals Junction Configuration Effects on the Photovoltaic Parameters of a-Si/CZTS Solar Cells

2022 ◽  
Author(s):  
H. Bitam ◽  
B. Hadjoudja ◽  
Beddiaf Zaidi ◽  
C. Shakher ◽  
S. Gagui ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Solar Cells ◽  
Solar Cell ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Photovoltaic Devices ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Reported Study ◽  
Stated Problem

Due to increased energy intensive human activities resulting accelerated demand for electric power coupled with occurrence of natural disasters with increased frequency, intensity, and duration, it becomes essential to explore and advance renewable energy technology for sustainability of the society. Addressing the stated problem and providing a radical solution has been attempted in this study. To harvest the renewable energy, among variety of solar cells reported, a composite a-Si/CZTS photovoltaic devices has not yet been investigated. The calculated parameters for solar cell based on the new array of layers consisting of a-Si/CZTS are reported in this study. The variation of i) solar cell efficiency as a function of CZTS layer thickness, temperature, acceptor, and donor defect concentration; ii) variation of the open circuit current density as a function of temperature, open circuit voltage; iii) variation of open circuit voltage as a function of the thickness of the CZTS layer has been determined. There has been no reported study on a-Si/CZTS configuration-based solar cell, analysis of the parameters, and study to address the challenges imped efficiency of the photovoltaic device and the same has been discussed in this work. The value of the SnO2/a-Si/CZTS solar cells obtained from the simulation is 23.9 %.

Carbazole-based small molecules for vacuum-deposited organic photovoltaic devices with open-circuit voltage exceeding 1 V

2017 ◽  
Vol 47 ◽  
pp. 162-173 ◽  
Author(s):  
Yuan Jay Chang ◽  
Jung-Lien Hsu ◽  
Yi-Hua Li ◽  
Sajal Biring ◽  
Tzu-Hung Yeh ◽  
...  
Keyword(s):  
Small Molecules ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices
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