On the Relationship Between Donor/Acceptor Interface Energy Levels and Open-Circuit Voltages

2017 ◽  
Vol 3 (8) ◽  
pp. 1700115 ◽  
Author(s):  
Peicheng Li ◽  
Weiji Hong ◽  
Yiying Li ◽  
Grayson Ingram ◽  
Zheng-Hong Lu
Keyword(s):  
Energy Levels ◽  
Interface Energy ◽  
Open Circuit ◽  
Donor Acceptor ◽  
The Relationship ◽  
Open Circuit Voltages

Tuning of HOMO energy levels and open circuit voltages in solar cells based on statistical copolymers prepared by ADMET polymerization

2014 ◽  
Vol 5 (21) ◽  
pp. 6287-6294 ◽  
Author(s):  
Bryan D. Paulsen ◽  
Joshua C. Speros ◽  
Megan S. Claflin ◽  
Marc A. Hillmyer ◽  
C. Daniel Frisbie
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Energy Levels ◽  
Open Circuit ◽  
Homo Energy ◽  
Admet Polymerization ◽  
Donor Acceptor ◽  
Statistical Copolymer ◽  
Open Circuit Voltages

A donor–acceptor statistical copolymer series spanning the entire composition window was prepared and studied in organic solar cells.

Influence of the cyanine counter anions on a bi-layer solar cell performance

2013 ◽  
Vol 1493 ◽  
pp. 275-280
Author(s):  
Olga Malinkiewicz ◽  
Thais Grancha ◽  
Martijn Lenes ◽  
Hicham Brine ◽  
Alejandra Soriano ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Energy Levels ◽  
Open Circuit ◽  
Cyanine Dye ◽  
Optimal Alignment ◽  
Solar Cell Performance ◽  
Counter Ions ◽  
Donor And Acceptor ◽  
Open Circuit Voltages

ABSTRACTWe present normal and inverted solution processed bi-layer solar cells using cationic cyanine dyes as the electron donor and a fullerene as the electron acceptor. The cells exhibit high open circuit voltages up to 1 volt showing the optimal alignment of donor and acceptor energy levels. We demonstrate the large effect that cyanine dye counter ions can have on the energetics of the solar cells and how the S-shaped current density vs. voltage (J-V) curves can be avoided.

Computational Designing of Low Energy Band Gap of New Donor-Acceptor (D-A) Copolymer Monomers for Organic Solar Cells: DFT and TD-DFT Study

2020 ◽  
Vol 8 (2) ◽  
pp. 44-54
Author(s):  
Sri Charitha Annam ◽  
◽  
K.V. Padmavathi ◽  
N. Murali Krishna ◽  
Mannam Subbarao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Open Circuit ◽  
Energy Band Gap ◽  
Td Dft ◽  
Donor Acceptor ◽  
A Chain ◽  
The Relationship ◽  
Homo Lumo

Via this look at efforts have been made to increase a chain of latest donor-acceptor (D-A) systems through the usage of 4-methoxy-2,7,nine-trimethyl-9H-carbazole (2,7-MMCB) as a electron donor and benzo[c][1,2,5] oxadiazole (BCO); benzo[c] [1,2,5] thiadiazole (BCT); benzo[c][1,2,5]selenadiazole (BCS); [1,2,5]oxadiazolo[3,4-c]pyridine (OCP); [1,2,5] thiadiazolo [3,4-c]pyridine (TCP); [1,2,5] selenadiazolo [3,4-c]pyridine (SCP); [1,2,5] oxadiazolo[3,4-d]pyridazine (ODP); [1,2,5] thiadiazolo[3,4-d]pyridazine (TDP) as electron acceptors. In this work, we executed calculations of DFT and TD-DFT/B3LYPmethod with /6-31G basis. Calculated and explored theoretical expertise of the HOMO, LUMO oenergies, the band gap (Eg), and the open-circuit voltage (Voc) of the studied compounds. To take a look at the relationship between molecularstructure and optoelectronic properties, the consequences of the extraordinary acceptor effect on the geometries and optoelectronic residences of those substances were discussed. The outcomes acquired show how the digital residences can be modified with many lessons of acceptors through the substituent and suggest that 2,7MMCB-ODP, 2,7MM CB-TDP, and 2,7MM CB-SDP are these compounds as suitable candidates for optoelectronic packages in solar cells inclusive of BHJ.

scholarly journals Effect of Electronic Acceptor Segments on Photophysical Properties of Low-Band-Gap Ambipolar Polymers

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Yuanzuo Li ◽  
Jingang Cui ◽  
Jianing Zhao ◽  
Jinglin Liu ◽  
Peng Song ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photophysical Properties ◽  
Energy Levels ◽  
Quantum Chemistry Calculation ◽  
Difference Density ◽  
Charge Difference Density ◽  
Chemistry Calculation ◽  
Donor Acceptor ◽  
The Relationship

Stimulated by a recent experimental report, charge transfer and photophysical properties of donor-acceptor ambipolar polymer were studied with the quantum chemistry calculation and the developed 3D charge difference density method. The effects of electronic acceptor strength on the structure, energy levels, electron density distribution, ionization potentials, and electron affinities were also obtained to estimate the transporting ability of hole and electron. With the developed 3D charge difference density, one visualizes the charge transfer process, distinguishes the role of molecular units, and finds the relationship between the role of DPP and excitation energy for the three polymers during photo-excitation.

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

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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