scholarly journals Simultaneous measurement of photocurrent and recombination emission in organic solar cell

2021 ◽  
Author(s):  
Ji-Hyun Lee ◽  
Masahiro HIRAMOTO ◽  
Seiichiro IZAWA
Keyword(s):  
Organic Solar Cells ◽  
Simultaneous Measurement ◽  
Organic Solar Cell ◽  
Fill Factor ◽  
Voltage Dependence ◽  
Photocurrent Density ◽  
Recombination Processes ◽  
Donor Acceptor ◽  
Recombination Emission ◽  
The Ideal

Abstract Charge transfer (CT) state is a key intermediate to understand recombination processes in organic solar cells (OSCs). In this study, we measured the recombination emission from the CT state under different applied voltages in OSCs and a photocurrent density flowing on the circuit simultaneously. We proposed a “photoluminescence (PL)–voltage (V) plot” that is the voltage dependence of PL intensity of the CT state. The PL–V plot includes information only from the CT state recombination at the donor/acceptor interface and is complementary to the “current density (J)–V plot” that is the most important information for evaluating OSCs. The results demonstrated that fill factor (FF) of the PL–V plot is higher than that of the J-V plot, predicting the ideal FF of the device. Our result demonstrated that the simultaneous measurement of photocurrent and recombination emission could be a strong tool for evaluating photoconversion characteristics in OSCs.

Fabrication and characterization of CuPc and PCBM based organic solar cell with metal interlayer

2015 ◽  
Vol 12 (5) ◽  
pp. 413-420
Author(s):  
Muhammad Ahsan Naveed ◽  
A. Hussain ◽  
K. Islam ◽  
P. Akhter
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Impedance Spectroscopy ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Silver Layer ◽  
Absorbance Spectrum ◽  
Heterojunction Solar Cells ◽  
Processing Cost ◽  
Donor Acceptor

Organic solar cells have potential as an alternative to conventional inorganic solar cell due to low processing cost, flexibility and easy fabrication technique. The goal of this paper is to study the characteristics of the CuPc and PCBM based organic solar cell by introducing a thin layer of Ag at the interface of donor (CuPc) and Acceptor (PCBM), their photovoltaic and optical properties were investigated. The heterojunction solar cells with and without silver inter layer were fabricated through thermal deposition in HR vacuum. The OPV solar cells were characterized using current-voltage graphs, absorbance spectrum and Impedance spectroscopy. Impedance spectroscopy was taken to identify the traps using series resistance, parallel resistance, and Impedance spectrums under different frequencies. Optical behaviors of these devices have been investigated with absorbance spectrum. Introducing Ag to interfacing point produced traps and these traps causes to decreased Voc, Isc, FF, and efficiency. The effect of silver layer at donor acceptor interface was studied.

scholarly journals End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells

2019 ◽  
Vol 29 (47) ◽  
pp. 1808429 ◽  
Author(s):  
Andrew Wadsworth ◽  
Helen Bristow ◽  
Zeinab Hamid ◽  
Maxime Babics ◽  
Nicola Gasparini ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Donor Acceptor ◽  
High Fill Factor ◽  
End Group

Preparations and Photovoltaic Properties of Thin Films Using Soluble Fulleropyrrolidine Derivatives for Organic Solar Cells

Solar Energy ◽  
2006 ◽  
Author(s):  
Mi-Ra Kim ◽  
Won Suk Shin ◽  
Sung-Ho Jin ◽  
Kastuhiko Fujida ◽  
Testuo Tsutsui ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Fill Factor ◽  
Single Layer ◽  
Photovoltaic Properties ◽  
Coating Method ◽  
Layer Thin Film ◽  
Chain Lengths

Organic solar cells made from bi-layer thin-film heterojunctions having poly((2-methoxy-5-(2′-ethylhexyloxy)-p-phenylene)vinylene) (MEH-PPV) as an electron donor and fulleropyrrolidine derivatives as an electron acceptor were investigated. We synthesized soluble fulleropyrrolidine derivatives substituted different chain lengths for the organic solar cell. Due to the high solubility and sufficiently long chain length of fulleropyrrolidine derivatives, though those are monomers, a thin film (about 50 nm) could be fabricated individually by the spin-coating method. The fill factor of the bi-layer device was achieved to be 0.40, which is higher than that of the single-layer device by a polymer/fulleropyrrolidine derivative blend film of 0.29, due to the decrease of the recombination.

Modified Fullerenes as an Acceptor in Bulk Heterojunction Organic Solar Cell – A Theoretical study

2021 ◽  
Author(s):  
Krishnan Sangameswaran ◽  
Kittusamy Senthilkumar
Keyword(s):  
Electronic Structure ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
High Efficiency ◽  
Theoretical Study ◽  
Bulk Heterojunction ◽  
Electronic Structure Calculations ◽  
Fullerene Derivatives ◽  
Donor Acceptor ◽  
Structure Calculations

In the present study the electronic structure calculations were used to provide the designing strategies for P3HT-fullerene derivatives based donor-acceptor materials for high efficiency Bulk Heterojunction Organic Solar Cells (BHJ...

scholarly journals Efficient carbazole-based small-molecule organic solar cells with an improved fill factor

RSC Advances ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 4867-4871 ◽  
Author(s):  
Yongtao Liu ◽  
Yanna Sun ◽  
Miaomiao Li ◽  
Huanran Feng ◽  
Wang Ni ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Central Unit ◽  
Donor Acceptor ◽  
End Group

In this study, a new acceptor–donor–acceptor (A–D–A) small molecule, DI3TCz, with carbazole as the central unit and 1,3-indanedione as the end group, was designed and synthesized for application in organic solar cells.

Boron-Nitrogen Doped Dihydroindeno[1,2-b]fluorene Derivatives as Acceptors in Organic Solar Cells

2019 ◽  
Author(s):  
Matthew Morgan ◽  
Maryam Nazari ◽  
Thomas Pickl ◽  
J. Mikko Rautiainen ◽  
Heikki M. Tuononen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Broad Absorption ◽  
Nitrogen Doped ◽  
Large Depth ◽  
End Products ◽  
Boron Nitrogen ◽  
The Way

The electrophilic borylation of 2,5-diarylpyrazines results in the formation of boron-nitrogen doped dihydroindeno[1,2-<i>b</i>]fluorene which can be synthesized via mildly air-sensitive techniques and the end products handled readily under atmosphereic conditions. Through transmetallation via diarylzinc reagents a series of derivatives were sythesized which show broad absorption profiles that highlight the versatility of this backbone to be used in organic solar cell devices. These compounds can be synthesized in large yields, in alow number of steps and functionalized at many stages along the way providing a large depth of possibilities. Exploratory device paramaters were studied and show PCE of 2%.

scholarly journals Accelerating organic solar cell material's discovery: high-throughput screening and big data

2021 ◽  
Author(s):  
Xabier Rodríguez-Martínez ◽  
Enrique Pascual-San-José ◽  
Mariano Campoy-Quiles
Keyword(s):  
Machine Learning ◽  
Big Data ◽  
High Throughput ◽  
Organic Solar Cells ◽  
High Throughput Screening ◽  
Organic Solar Cell ◽  
State Of The Art ◽  
Review Article ◽  
Machine Learning Algorithms ◽  
Device Optimization

This review article presents the state-of-the-art in high-throughput computational and experimental screening routines with application in organic solar cells, including materials discovery, device optimization and machine-learning algorithms.

Additive-induced Miscibility Regulation and Hierarchical Morphology Enables 17.5% Binary Organic Solar Cells

2021 ◽  
Author(s):  
Jie Lv ◽  
Hua Tang ◽  
Jiaming Huang ◽  
Cenqi Yan ◽  
Kuan Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Power Conversion ◽  
Charge Trapping ◽  
Free Charge ◽  
Charge Generation ◽  
Low Charge ◽  
Hierarchical Morphology

Due to the barrierless free charge generation, low charge trapping, and high charge mobilities, the PM6:Y6 organic solar cell (OSC) achieves excellent power conversion efficiency (PCE) of 15.7%. However, the...

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