scholarly journals Effect of main and side chain chlorination on the photovoltaic properties of benzodithiophene-alt-benzotriazole polymers

2020 ◽  
Vol 8 (43) ◽  
pp. 15426-15435
Author(s):  
Haijun Bin ◽  
Indunil Angunawela ◽  
Ruijie Ma ◽  
Asritha Nallapaneni ◽  
Chenhui Zhu ◽  
...  
Keyword(s):  
Energy Level ◽  
Charge Transport ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Open Circuit ◽  
Side Chain ◽  
Photovoltaic Properties ◽  
Homo Energy Level

Introduction of chlorine in the conjugated side chains significantly improves open-circuit voltage and power conversion efficiency, benefiting from a lower HOMO energy level, well-balanced charge transport and superior nanoscale morphology.

Synthesis and Photovoltaic Properties of Fluorene-Based Copolymers

2010 ◽  
Vol 150-151 ◽  
pp. 340-343
Author(s):  
Qiong Hou ◽  
Xiang Hua Zeng ◽  
Hong Yu Zhen ◽  
Guo Long Li ◽  
Ting Guo ◽  
...  
Keyword(s):  
Thin Films ◽  
Power Conversion Efficiency ◽  
Open Circuit Voltage ◽  
Narrow Band ◽  
Power Conversion ◽  
Open Circuit ◽  
Side Chain ◽  
Coupling Reactions ◽  
Photovoltaic Properties ◽  
Hetero Cycle

A serial of polyfluorene copolymers have been developed by covalently attaching thiophene units to the side chain of polyfluorene with an alkyl spacer by means of Pd-catalyzed Suzuki coupling reactions. The electrochemical, photophysical 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/ PFO-FT-DBT: PCBM (1:2)/Al is 0.83% with open-circuit voltage (Voc) 0.75V. Further investigation of more polyfluorene copolymers with narrow band gap aryl-hetero cycle units on the side chain is in progress.

A diketopyrrolopyrrole and benzothiadiazole based small molecule electron acceptor: design, synthesis, characterization and photovoltaic properties

RSC Advances ◽  
2014 ◽  
Vol 4 (101) ◽  
pp. 57635-57638 ◽  
Author(s):  
Aaron M. Raynor ◽  
Akhil Gupta ◽  
Hemlata Patil ◽  
Ante Bilic ◽  
Sheshanath V. Bhosale
Keyword(s):  
Thermal Stability ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Small Molecule ◽  
Electron Acceptor ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Open Circuit ◽  
Photovoltaic Properties ◽  
Design Synthesis

A novel solution-processable electron acceptor based on diketopyrrolopyrrole and benzothiadiazole (N6), exhibited excellent solubility and thermal stability, and afforded 1.16% power conversion efficiency with high open-circuit voltage (1.08 V).

Enhanced efficacy of defect passivation and charge extraction for efficient perovskite photovoltaics with a small open circuit voltage loss

2019 ◽  
Vol 7 (15) ◽  
pp. 9025-9033 ◽  
Author(s):  
Jin-Feng Liao ◽  
Wu-Qiang Wu ◽  
Jun-Xing Zhong ◽  
Yong Jiang ◽  
Lianzhou Wang ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Charge Recombination ◽  
Open Circuit ◽  
Polymeric Semiconductor ◽  
Voltage Loss ◽  
Defect Passivation

A multifunctional 2D polymeric semiconductor was incorporated to provide surprisingly robust efficacy in grain boundary functionalization and defect passivation of perovskite, which suppresses charge recombination and thus affording an illustrious photovoltage of 1.16 V and power conversion efficiency of 21.1%.

Effect of temperature on organic Schottky barrier cells

1981 ◽  
Vol 59 (6) ◽  
pp. 727-732 ◽  
Author(s):  
Rafik O. Loutfy ◽  
Cheng-Kuo Hsiao
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Schottky Barrier ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Short Circuit ◽  
Power Conversion ◽  
Open Circuit ◽  
Effect Of Temperature ◽  
Photovoltaic Properties

The effect of temperature on the photovoltaic properties of indium/metal-free phthalocyanine Schottky barrier solar cells was investigated in the range 260–350 K. In general, the short circuit photocurrent, Jsc, and fill factor, ff, increased with increasing temperature (in contrast to inorganic photocells). The device series resistance and open circuit photovoltage, Voc, decreased (similar to inorganic photocells) as temperature was raised. An increase in the overall power conversion efficiency, η, has been observed with increase of temperature. In the case of x-H2Pc, the power conversion efficiency increased by 2.5 times due to a temperature rise of 60 °C above ambient. Thus, for operation at temperatures above ambient, organic solar cells may offer a significant advantage over inorganic cells.Analysis of the variation of the photovoltage with temperature showed that the decrease in Voc is mainly due to variation injunction impedance, which is controlled by thermionic current at high temperature and ionized impurity at low temperature.

Efficient large guanidinium mixed perovskite solar cells with enhanced photovoltage and low energy losses

2019 ◽  
Vol 55 (30) ◽  
pp. 4315-4318 ◽  
Author(s):  
Shengfan Wu ◽  
Zhen Li ◽  
Jie Zhang ◽  
Tiantian Liu ◽  
Zonglong Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Low Energy ◽  
Energy Losses ◽  
Perovskite Lattice

We present a strategy for suppressing the open-circuit voltage (Voc) loss of perovskite solar cells by incorporating large guanidinium cations (Gua+) into a perovskite lattice, leading to a significantly improved Voc of 1.19 V and an impressive power conversion efficiency of >21%.

scholarly journals Intra- and Intermolecular Steric Hindrance Effects Induced Higher Open-Circuit Voltage and Power Conversion Efficiency

2015 ◽  
Vol 4 (4) ◽  
pp. 361-366 ◽  
Author(s):  
Liangliang Han ◽  
Weichao Chen ◽  
Tong Hu ◽  
Junzhen Ren ◽  
Meng Qiu ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Steric Hindrance ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Open Circuit

The first thieno[3,4-b]pyrazine based small molecular acceptor with a linear A2–A1–D–A1–A2 skeleton for fullerene-free organic solar cells with a high Voc of 1.05 V

2018 ◽  
Vol 54 (76) ◽  
pp. 10770-10773 ◽  
Author(s):  
Jianfeng Li ◽  
Jing Yang ◽  
Junyi Hu ◽  
You Chen ◽  
Bo Xiao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Open Circuit ◽  
Moderate Power

The first thieno[3,4-b]pyrazine (TP) based non-fullerene acceptor was designed and synthesized, which could realize a moderate power conversion efficiency (PCE) of 5.81% with a high open-circuit voltage (Voc) of 1.05 V by using J61 as a donor polymer.

A high efficiency solution processed polymer inverted triple-junction solar cell exhibiting a power conversion efficiency of 11.83%

2015 ◽  
Vol 8 (1) ◽  
pp. 303-316 ◽  
Author(s):  
Abd. Rashid bin Mohd Yusoff ◽  
Dongcheon Kim ◽  
Hyeong Pil Kim ◽  
Fabio Kurt Shneider ◽  
Wilson Jose da Silva ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Triple Junction ◽  
High Efficiency ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Open Circuit ◽  
Tandem Solar Cells

We propose that 1 + 1 + 1 triple-junction solar cells can provide an increased efficiency, as well as a higher open circuit voltage, compared to tandem solar cells.

Substituent effects in magnesium tetraethynylporphyrin with two diketopyrrolopyrrole units for bulk heterojunction organic solar cells

2017 ◽  
Vol 5 (44) ◽  
pp. 23067-23077 ◽  
Author(s):  
Keisuke Ogumi ◽  
Takafumi Nakagawa ◽  
Hiroshi Okada ◽  
Ryohei Sakai ◽  
Huan Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Substituent Effects ◽  
Open Circuit ◽  
Donor Acceptor

Acceptor–donor–acceptor conjugated magnesium porphyrins showed a power conversion efficiency of 5.73%, high open-circuit voltage of 0.79 V, or an extended incident photon-to-current conversion efficiency spectrum to 1100 nm, depending on the substituents.

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