Charge transport in quantum dot sensitized solar cells: A mathematical model

Singhal, Varun Kumar; Verma, Upendra Kumar; Joshi, Medha; Kumar, Brijesh

doi:10.1016/j.solener.2022.09.013

Cited by 5 publications

(4 citation statements)

References 26 publications

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“…5. The DG model takes photovoltaic cells and solid oxide fuel as an example: The photovoltaic cell model is established by simplifying and deducing the equivalent circuit of photovoltaic power generation and according to the experimental fitting compensation coefficient [26]. The fuel cell model uses the semi-empirical model to obtain the differential equation for the partial pressure of gas, which is established according to the Nernst equation [27].…”

Section: Overhead Linementioning

confidence: 99%

A Situational Awareness Method for Initial Insulation Fault of Distribution Network Based on Multi-Feature Index Comprehensive Evaluation

Bai,

Liu,

Liu

et al. 2024

ENERGY

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Most ground faults in distribution network are caused by insulation deterioration of power equipment. It is difficult to find the insulation deterioration of the distribution network in time, and the development trend of the initial insulation fault is unknown, which brings difficulties to the distribution inspection. In order to solve the above problems, a situational awareness method of the initial insulation fault of the distribution network based on a multi-feature index comprehensive evaluation is proposed. Firstly, the insulation situation evaluation index is selected by analyzing the insulation fault mechanism of the distribution network, and the relational database of the distribution network is designed based on the data and numerical characteristics of the existing distribution management system. Secondly, considering all kinds of fault factors of the distribution network and the influence of the power supply region, the evaluation method of the initial insulation fault situation of the distribution network is proposed, and the development situation of the distribution network insulation fault is classified according to the evaluation method. Then, principal component analysis was used to reduce the dimension of the training samples and test samples of the distribution network data, and the support vector machine (SVM) was trained. The optimal parameter combination of the SVM model was found by the grid search method, and a multi-class SVM model based on 1-v-1 method was constructed. Finally, the trained multi-class SVM was used to predict 6 kinds of situation level prediction samples. The results of simulation examples show that the average prediction accuracy of 6 situation levels is above 95%, and the perception accuracy of 4 situation levels is above 96%. In addition, the insulation maintenance decision scheme under different situation levels is able to be given when no fault occurs or the insulation fault is in the early stage, which can meet the needs of power distribution and inspection for accurately sensing the insulation fault situation. The correctness and effectiveness of this method are verified.

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Section: Overhead Linementioning

confidence: 99%

A Situational Awareness Method for Initial Insulation Fault of Distribution Network Based on Multi-Feature Index Comprehensive Evaluation

Bai,

Liu,

Liu

et al. 2024

ENERGY

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“…Despite minimal differences in transmittance between the rough and smooth surfaces under electrolyte infiltration conditions, the rough surface exhibits a significantly higher specific surface area compared to that of the smooth surface. Providing new materials and opening up new avenues for solar cells and other fields related to titanium dioxide thin films. − …”

Section: Introductionmentioning

confidence: 99%

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus

Jiang,

Dai,

Xie

et al. 2024

ACS Appl. Mater. Interfaces

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In this research, the structural characteristics of the mountain holly leaf were emulated. It was observed that after the initially uneven surface of the petals is filled with infiltrated water, it exhibits a distinctive transparent beauty after rainfall. Furthermore, the presence of leaf veins enhances the structural strength of the petals and facilitates nutrient transport. Inspired by previous studies on double-layer spin-coated films, we further developed and designed the TA TiO 2 @MWCNT photocathode thin film. This innovative film incorporates multiwalled carbon nanotubes (MWCNT) into a previously established TA TiO 2 photocathode thin film. The inclusion of MWCNT results in the formation of a three-dimensional highway structure, where MWCNT intertwines within the TA TiO 2 film. Under the operational state of immersion in the electrolyte, it maintains a level of transparency similar to that of the TA TiO 2 photoanode thin film. The high-temperature sintering process results in the oxidation and depletion of MWCNTs on the surface of the film, leaving behind uniformly dispersed concave defects, thereby greatly enhancing the specific surface area. The findings demonstrate that the optoelectrode of high transparency and high specific surface area, TA TiO 2 @MWCNT, comprehensively enhances the performance of the solar cells. The transparent QDSSC surpasses its counterparts for the first time, achieving a power conversion efficiency (PCE) of 6.335%. This sets the stage for new materials and innovative approaches in the field of solar cells and other titanium dioxide film-related areas.

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“…It is an ideal material for the assembly of transparent QDSSCs and can also be applied to other related fields. 19 It is a new TiO 2 material with great potential. Here, we prepared an anatase TiO 2 film with a smooth and transparent surface.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, the absorption of ultraviolet light by TiO 2 is retained. It is an ideal material for the assembly of transparent QDSSCs and can also be applied to other related fields . It is a new TiO 2 material with great potential.…”

Section: Introductionmentioning

confidence: 99%

Interface Regulation and Properties of Transparent Anatase TiO₂ Photoanode Quantum Dot-Sensitized Solar Cells

Jiang,

Dai,

Xie

et al. 2023

ACS Appl. Nano Mater.

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In this work, we propose a strategy that is different from the traditional technology of increasing the specific area of the TiO 2 film to improve the carrying capacity of QDs in QDSSCs. Transparent anatase TiO 2 films are prepared by improving the optical transmittance of the photoanode TiO 2 film so that the attached QDs can capture more photons and improve the efficiency of utilizing QDs. This QDSSC preparation technology sacrifices part of QDs loading but improves the utilization efficiency of QDs. At the same time, the transparent bulk TiO 2 film decreases the transmission distance of photogenerated charge carriers, reduces the cross-interface transport, optimizes the transmission path, and reduces the carrier capture composite rate compared with the TiO 2 particle film. Therefore, it not only increases the V oc , FF, and PCE of QDSSCs to 0.628 V, 54.7, and 6.166%, respectively, but also has greater transparency. It meets the demand for solar cell transparency in practical applications and has a wider range of applications and better aesthetics. The mechanism simulation and theoretical analysis of photothermal conversion and electromagnetic mechanism show that the barrier of carrier transfer in bulk transparent anatase TiO 2 is lower than the physical barrier between anatase TiO 2 NPs. The advantages of the anatase transparent TiO 2 film in the process of photogenerated charge carrier transmission are verified. It provides an idea for the development of QDSSCs. It also brings the technology of transparent TiO 2 film to related fields.

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Charge transport in quantum dot sensitized solar cells: A mathematical model

Cited by 5 publications

References 26 publications

A Situational Awareness Method for Initial Insulation Fault of Distribution Network Based on Multi-Feature Index Comprehensive Evaluation

A Situational Awareness Method for Initial Insulation Fault of Distribution Network Based on Multi-Feature Index Comprehensive Evaluation

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus

Interface Regulation and Properties of Transparent Anatase TiO₂ Photoanode Quantum Dot-Sensitized Solar Cells

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Charge transport in quantum dot sensitized solar cells: A mathematical model

Cited by 5 publications

References 26 publications

A Situational Awareness Method for Initial Insulation Fault of Distribution Network Based on Multi-Feature Index Comprehensive Evaluation

A Situational Awareness Method for Initial Insulation Fault of Distribution Network Based on Multi-Feature Index Comprehensive Evaluation

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO2@MWCNT Photoanode Based on the Bionic Mountain Lotus

Interface Regulation and Properties of Transparent Anatase TiO2 Photoanode Quantum Dot-Sensitized Solar Cells

Contact Info

Product

Resources

About

Improved Performance of QDSSCs Can Be Achieved by Constructing a Transparent Anatase TiO₂@MWCNT Photoanode Based on the Bionic Mountain Lotus

Interface Regulation and Properties of Transparent Anatase TiO₂ Photoanode Quantum Dot-Sensitized Solar Cells