Search query: Bi2O3 solar cell

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abstract: Fabrication of efficient, effective, and low cost solar cell is still a challenging task using metal oxide semiconductors; in this work, g MnO2/a Bi2O3 heterojunction was deposited on amorphous silicon substrate (a Si) as a solar cell using vacuum thermal evaporation technique. XRD analysis of g MnO2/a Bi2O3 showed a polycrystalline structure; SEM micrographs revealed that g MnO2 has quasi spherical nanoparticles with a grain size average of 86.86 nm, while a Bi2O3 has cauliflower like microstructure with a grain size average of 250.71 nm; the optical bandgap were found to be 3.792 and 1.888 eV for g MnO2 and a Bi2O3 respectively; I V characteristic curve measurement was performed to evaluate the photovoltaic efficiency of MgF2/g MnO2/a Bi2O3/a Si solar cell and found to be 3.28%
author_names: Aus A Najim

Malek A H Muhi

Kadhim R Gbashi

Ammar T Salih
title: Synthesis of Efficient and Effective g MnO2/a Bi2O3/a Si Solar Cell by Vacuum Thermal Evaporation Technique
venue: Plasmonics
year: 2017

abstract: Efficiency of Silicon commercial solar cells covered with germanate glasses doped with Eu3+ ions, with and without gold nanoparticles, was measured. Enhancement of the efficiency was observed in the presence of gold nanoparticles when compared to germanate glasses without gold nanoparticle. The results were attributed to the plasmonic enhancement around Eu3+ ions due to the presence of gold nanoparticles and the energy transfer from excited nanoparticles to the Eu3+ ions.
author_names: J A M Garcia

Luciana R P Kassab

Roberto Koji Onmori

Bismarck Costa Lima

L A Gomez-Malagon

Anderson S L Gomes
title: Influence of gold nanoparticles on Eu3+ doped GeO2 Bi2O3 glasses covered Silicon solar cell
venue: 2016 31st Symposium on Microelectronics Technology and Devices (SBMicro)
year: 2016

abstract: Pb based hybrid perovskite solar cells, despite their advantages, face challenges in commercialization. In recent years, Bi based chalcohalides are being considered as potential alternative candidates, however, their current device efficiency remains unsatisfactory. Herein, a two step solution method is developed and applied to the fabrication of BiSI films. The method consists of the formation of Bi2S3 (step I) and its conversion to BiSI (step II) The Bi2S3 was fabricated by a thiol amine solution process and the BiSI conversion was achieved by chemical reaction between the as formed Bi2S3 and BiI3. It was found that the formation of BiSI was highly dependent on the Bi:S molar ratio of the Bi2O3 thiourea solution and the number of times of step I. The as fabricated BiSI film had an optical band gap of 1.61 eV and exhibited nanorod morphology. In addition, the electronic structure is explored and discussed for solar cells applications.
author_names: Yong Chan Choi

Eunjeong Hwang
title: Controlled Growth of BiSI Nanorod Based Films through a Two Step Solution Process for Solar Cell Applications
venue: Nanomaterials
year: 2019

abstract: In this study, eco friendly Pb free Bi2O3 B2O3 ZnO glass frits were chosen as an inorganic additive for the Al paste used in Si solar cells. The effects of the molar ratio of Bi2O3 to B2O3 in the glass composition on the electrical resistance of the Al electrode and on the cell performance were investigated. The results showed that as the molar ratio of Bi2O3 to B2O3 increased, the glass transition temperature and softening temperature decreased because of the reduced glass viscosity. In Al screen printed Si solar cells, as the molar ratio of Bi2O3 to B2O3 increased, the sheet electrical resistance of the Al electrode decreased and the cell efficiency increased. The uniformity and thickness of the back surface field was significantly influenced by the glass composition.
author_names: Bit-Na Kim

Hyeong Jun Kim

Hyo Sik Chang

Hyun Seon Hong

Sung-Soo Ryu

Heon Lee
title: Effect of the Molar Ratio of B2O3 to Bi2O3 in Al Paste with Bi2O3 B2O3 ZnO Glass on Screen Printed Contact Formation and Si Solar Cell Performance
year: 2013

abstract: The coupling of a solar cell with a super capacitor is gaining interest owing to its superior photo to electrical conversion efficiency and its in situ energy storage ability for green and sustainable energy development. In this work, the electrochemical performances of the fabricated super capacitor and perovskite solar cell were individually measured for the fabrication of a photo super capacitor. A Bi2O3/MnO2 based symmetrical and asymmetrical super capacitor were fabricated. The symmetrical super capacitor could charge up to 1.0 V, which gave a specific capacitance of 136.4 F/g at a scan rate of 2 mV/s. The power and energy densities of the bismuth based symmetrical super capacitor were 51.8 W/kg and 7.1 Wh/kg, respectively and were improved to 25.6 Wh/kg and 115.3 W/kg when a Bi2O3/MnO2 positive electrode was integrated to a polypyrrole/reduced graphene oxide (PyR) negative electrode. It thus proven the feasibility of an asymmetrical super capacitor to promote the performance of a super capacitor. The dissatisfying stability performance of the Bi2O3/MnO2//PyR asymmetrical super capacitor (60% capacitance retained) prompted for screening of other pseudocapacitive materials. An asymmetrical super capacitor comprising a positive cobalt oxide/zinc oxide/reduced graphene oxide electrode (RZCo) and a negative polypyrrole/reduced graphene oxide electrode was then fabricated. A wide operational potential range for the RZCo//PyR asymmetrical super capacitor resulted in a high specific capacitance of 470.8 F/g, as opposed to the Bi2O3/MnO2 symmetrical super capacitor of 136.4 F/g and 144.1 F/g for the bismuth based asymmetrical super capacitor, at a scan rate of 2mV/s, additionally exhibited 1.6 fold higher in energy and power densities, which fulfilling the criteria as the energy storage device for the photo super capacitor.Perovskite solar cells were fabricated from a series of cesium based halide mixtures perovskite harvesting materials, denoted as CsPbBr3 xIx, where x 0 0.3. An optimum iodide concentration of CsPbBr2.9I0.1 perovskite solar cell with an efficiency of 3.9% was fabricated. The solar cell achieved an open circuit voltage of more than 1.0 V and a fill factor of 64% by employing Spiro OMeTAD as a hole transporting material with enhanced stability. The performances of the CsPbBr2.9I0.1 solar cell with P3HT/MoO3 hole transporting material was also investigated. The deeper HOMO and shallower LUMO level of the hole and electron transporting materials, respectively has achieved high Voc of 1.23 V, but with lower power conversion efficiency of 2.51% due to reduction in the Jsc, implies an additional charge loss processes at the interface of perovskite/HTM. In high humidity of more than 80 percent, the perovskite solar cell comprising CsPbBr2.9I0.1 achieved an efficiency of 0.46% The perovskite solar cell retains 70% of its original efficiency after a week storage in dark and 33% efficiency retained under UV and air exposure at a high relative humidity of more than 80% for 24 hours. The integration of the perovskite solar cell and the asymmetrical super capacitor enabled simultaneous photoconversion and charge storage within the photo super capacitor. The photovoltage and photocurrent measurements were successfully performed, evidencing that the photo super capacitor was responsive to light illumination. Referred to the photovoltage measurement, zero voltage was presented at the first 50 s without the shine of light. Subsequently, the photovoltage was abruptly shooted up to ~80 mV and continue increasing to 90 mV for 100 s in the presence of light, and was then decreases drastically when light was switched off. To further proof the energy conversion and storage of the photo super capacitor, the photocharged integrated device was galvanostatically discharged in dark at the current of 0.1 mA. As the integrated device reaches the cut off potential of 0.07 V, the discharging process took place in dark with the connection of only super capacitor's electrodes, thus shows the workability of the photo super capacitor. To enable practical application, improvizations such as optimizing thickness of each active layer and encapsulation of the photo super capacitor are needed to prevent electrolyte loss.
author_names: Chi Huey Ng
title: Fabrication of super capacitor and perovskite sensitized solar cell for the assembly of photo super capacitor
year: 2018

abstract: The present invention discloses a paste composition for preparing a solar cell electrode, a solar cell electrode, and a solar cell wherein the paste composition comprises conductive powder, an organic carrier and glass powder. The glass powder contains 0.1 to 20 wt% of PbO, 30 to 60 wt% of Bi2O3, 1.0 to 15 wt% of TeO2 and 8 to 30 wt% of WO3, and the mass ratio of TeO2 to WO3 is 0.5: 1 to 1.75: 1. The solar cell electrode prepared through the use of the paste composition of the present invention has excellent adhesive strength and minimizes the series resistance (Rs) thereby providing high conversion efficiency.
title: Paste composition for preparing solar cell electrode, solar cell electrode and solar cell
year: 2016

abstract: The invention relates to a back field aluminum paste for a crystalline silicon solar cell. The raw material of the back field aluminum paste for the crystalline silicon solar cell comprises, by weight, 74 parts of aluminum powder, 20 25 parts of organic binder, 1 4 parts of lead free glass power and 0.1 2 parts of additive. The raw material of the organic binder comprises, by weight, 40 70 parts of terpineol, 5 10 parts of butyl carbitol, 5 10 parts of butyl carbitol acetate, 3 10 parts of ethyl cellulose, 5 15 parts of dibutyl phthalate and 1 part of sorbitan stearate. The raw material of thelead free glass power comprises, by weight, 30 60 parts of Bi2O3, 5 15 parts of B2O3, 3 parts of BiF3, 10 20 parts of SiO2, 5 10 parts of ZnO, 1 5 parts of TiO2, 10 20 parts of Al2O3 and 1 3 parts ofP2O5. The additive is spherical copper power with the purity of more than 99% and the fineness of 20000 mesh. The aluminum powder, the organic binder, the lead free glass powder and the additives aremixed uniformly and rolled with a three roll mill to obtain a fineness of less than or equal to 10 micrometer and a viscosity of 30 60Pa.s. The back field aluminum paste for the crystalline silicon solar cell has high photoelectric conversion efficiency, high adhesion, little adhesion conversion efficiencyattenuation after high temperature aging and good boiling resistance.
title: Back field aluminum paste for crystalline silicon solar cell
year: 2016

abstract: Developing a lead free glass frit binder in aluminum electrode paste is one of important subjects for further development of Si solar cell. However, lead free aluminum electrode usually shows weaker mechanical and electric properties. The effects of B2O3content in Bi2O3 SiO2 B2O3 ZnO based glass frit on the mechanical and electric properties of solar cell were investigated. It is found that B2O3is the main factor causing the electrode instability and ashing.Reducing or removing the content of B2O3can improve the electrode stability and membrane strength but lead to higher contact resistance between Si and Al electrode and lower photovoltage of Si solar cell. A new Bi2O3 SiO2 Fe2O3 ZnO lead free glass system, in which B2O3was replaced by Fe2O3, was designed and prepared. Results show that the Al electrode using this new glass frit shows good water resistance, good electrical performance and surface and membrane strength.
author_names: Zhang Hon
title: Effect of B_2O_3 content in lead free glass frit on the stability of aluminum electrode of Si solar cell
year: 2013

abstract: Conductive paste of the present invention contains at least a conductive powder, glass frit and an organic vehicle, said glass frit comprising Te, Ba, Bi, and further comprising selecting from Li, Na and K, at least one. The molar amount of Te in terms of TeO2 in terms of 55 85mol% containing a molar amount of Ba in terms of BaO is 0.1 35mol% Bi in terms of molar amount in terms of Bi2O3 0.1 25mol comprising an amount of at least one mole and selected from the Li, Na and K, in terms of oxides is 0.1 15mol% The conductive paste is formed using the light receiving surface electrode (3) Thereby achieving electrically conductive paste electrodes adapted to make contact resistance between the electrode (3) and the semiconductor substrate (1) a lower solar cell formed by using the electrically conductive paste to achieve high energy conversion efficiency, excellent battery characteristics of the solar cell.
title: A conductive paste and a solar cell
year: 2013

abstract: The present invention relates to an electrode paste for solar cell, an electrode which is manufactured thereby and a solar cell comprising the same and more specifically, to an electrode paste for solar cell, an electrode which is manufactured thereby and a solar cell comprising the same which comprise: a conductive powder, a glass frit and an organic vehicle; wherein the glass frit comprises PbO, Bi2O3 and TeO2. The glass frit comprises: 5 55 weight% of Bi2O3, 10 40 weight% of TeO2 and residual quantity of PbO. [Reference numerals] (AA) Light
title: Electrode paste for solar cell, electrode prepared from the same and solar cell comprising the same
year: 2012