Charge Transfer at Photoelectrochemical Solar Cells: Conclusions from the Open‐Circuit Impedance of p ‐ InP in  V 3 +  / 2 +

1995 ◽  
Vol 142 (3) ◽  
pp. 850-862 ◽  
Author(s):  
J. Schefold
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Open Circuit ◽  
Photoelectrochemical Solar Cells ◽  
Circuit Impedance

Study of Photoelectrochemical Solar Cell Using WSe2 Crystal

2013 ◽  
Vol 665 ◽  
pp. 330-335 ◽  
Author(s):  
Ripal Parmar ◽  
Dipak Sahay ◽  
R.J. Pathak ◽  
R.K. Shah
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Fill Factor ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Open Circuit ◽  
Cell Parameters ◽  
Photoelectrochemical Solar Cell ◽  
Photoelectrochemical Solar Cells

The solar cells have been used as most promising device to convert light energy into electrical energy. In this paper authors have attempted to fabricate Photoelectrochemical solar cell with semiconductor electrode using TMDCs. The Photoelectrochemical solar cells are the solar cells which convert the solar energy into electrical energy. The photoelectrochemical cells are clean and inexhaustible sources of energy. The photoelectrochemical solar cells are fabricated using WSe2crystal and electrolyte solution of 0.025M I2, 0.5M NaI, 0.5M Na2SO4. Here the WSe2crystals were grown by direct vapour transport technique. In our investigations the solar cell parameters like short circuit current (Isc) and Open circuit voltage (Voc) were measured and from that Fill factor (F.F.) and photoconversion efficiency (η) are investigated. The results obtained shows that the value of efficiency and fill factor of solar cell varies with the illumination intensities.

Varying polymer crystallinity in nanofiber poly(3-alkylthiophene): PCBM solar cells: Influence on charge-transfer state energy and open-circuit voltage

2009 ◽  
Vol 95 (12) ◽  
pp. 123303 ◽  
Author(s):  
Koen Vandewal ◽  
Wibren D. Oosterbaan ◽  
Sabine Bertho ◽  
Veerle Vrindts ◽  
Abay Gadisa ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
State Energy ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Charge Transfer State ◽  
Polymer Crystallinity ◽  
Transfer State

scholarly journals Charge transfer state characterization and voltage losses of organic solar cells

2021 ◽  
Author(s):  
Anna Jungbluth ◽  
Pascal Kaienburg ◽  
Moritz Riede
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Detailed Balance ◽  
Open Circuit ◽  
Theory Approach ◽  
Emission Data ◽  
Correct Determination ◽  
Improved Performance

Abstract A correct determination of voltage losses is crucial for the development of organic solar cells with improved performance. This requires an in-depth understanding of the properties of interfacial charge transfer (CT) states, which not only set the upper limit for the open-circuit voltage of a system, but also govern radiative and non-radiative recombination processes. Over the last decade, different approaches have emerged to classify voltage losses in organic solar cells that rely on a generic detailed balance approach or additionally include CT state parameters that are specific to organic solar cells. In the latter case, a correct determination of CT state properties is paramount. In this work, we summarize the different frameworks used today to calculate voltage losses and provide an in-depth discussion of the currently most important models used to characterize CT state properties from absorption and emission data of organic thin films and solar cells. We also address practical concerns during the data recording, analysis, and fitting process. Departing from the classical two-state Marcus theory approach, we discuss the importance of quantized molecular vibrations and energetic hybridization effects in organic donor-acceptor systems with the goal to providing the reader with a detailed understanding of when each model is most appropriate.

Ordered Single-Crystalline Anatase TiO2Nanorod Clusters Planted on Graphene for Fast Charge Transfer in Photoelectrochemical Solar Cells

Small ◽  
2017 ◽  
Vol 13 (28) ◽  
pp. 1700793 ◽  
Author(s):  
Yang Wang ◽  
Xueqin Liu ◽  
Zhen Li ◽  
Ya Cao ◽  
Yinchang Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Single Crystalline ◽  
Fast Charge ◽  
Photoelectrochemical Solar Cells

scholarly journals Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Ciaran Lyons ◽  
Neelima Rathi ◽  
Pratibha Dev ◽  
Owen Byrne ◽  
Praveen K. Surolia ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Density Functional ◽  
Organic Dyes ◽  
Intermediate Frequency ◽  
Charge Transfer Resistance ◽  
Open Circuit ◽  
Ethanol Solution ◽  
Recombination Rates ◽  
Transfer Resistance

A chromophore containing a coplanar dihexyl-substituted dithienosilole (CL1) synthesised for use in dye-sensitised solar cells displayed an energy conversion efficiency of 6.90% under AM 1.5 sunlight irradiation. The new sensitiser showed a similar fill factor and open-circuit voltage when compared with N719. Impedance measurements showed that, in the dark, the charge-transfer resistance of a cell using CL1 in the intermediate-frequency region was higher compared to N719 (69.8 versus 41.3 Ω). Under illumination at AM 1.5G-simulated conditions, the charge-transfer resistances were comparable, indicative of similar recombination rates by the oxidised form of the redox couple. The dye showed instability in ethanol solution, but excellent stability when attached to TiO2. Classical molecular dynamics indicated that interactions between ethanol and the dye are likely to reduce the stability of CL1 in solution form. Time-dependent density functional theory studies were performed to ascertain the absorption spectrum of the dye and assess the contribution of various transitions to optical excitation, which showed good agreement with experimental results.

scholarly journals p-Type Polymers for Templated Crystallization of Perovskite Films and Interface Optimization for High Performance Solar Cells

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 654
Author(s):  
Wei-Wei Zuo ◽  
Weifei Fu ◽  
Wan-Sheng Zong ◽  
Shen-Gang Xu ◽  
Ying-Liang Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
High Performance ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Device Performance ◽  
Phase Purity ◽  
Perovskite Material ◽  
P Type

The purity of the perovskite material is of paramount importance as it determines the optoelectronic properties and, hence, the device performance. However, the error during the experiment and incomplete crystallization is inevitable, leading to a low quality. Here, two p-type polymers were designed to template the crystallization of perovskite to obtain perovskite films with higher crystallinity and higher phase purity. The polymers at the perovskite/transport interface could also improve the charge transfer and, thus, the device performance. In this study, the highest efficiency device achieved an efficiency value of ~19% with improved open-circuit voltage and fill factor.

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