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The influence of reduced graphene oxide on the structure of the electrodes and the properties of dye-sensitized solar cells

100%

Dobrzański L. A. , Prokopiuk v. P. M.

tom Vol. 77, nr 1

12--30

Purpose of the paper: The aim of the research is to investigate the influence of the structure and chemical composition of the surface layers containing reduced oxide graphene on the properties of dye-sensitized solar cells, and to determine the correlation between the morphology and physicochemical properties of reduced graphene oxide and the electrical and optical properties of dye-sensitized solar cells, which will result in the desired effects reducing production costs and increasing the efficiency of dye cells. Design/methodology/approach: Complete manufacturing technology of dye-sensitized solar cells included the selection of the conditions of the thermal reduction of graphene oxide, the development of manufacturing technology of photoanode with and without reduced graphene oxide, the development of manufacturing technologies of counter electrodes with the reduced graphene oxide and the production of dye-sensitized solar cells by combining photoanode and counter electrode and filling the space between them by the electrolyte. Findings: A reduced graphene oxide layers applied to a glass substrate with transparent conductive oxide, used as a counter electrode and photoanode effect on reducing the degree of recombination and increasing electrochemical properties, which makes them important factors in increasing the efficiency of photovoltaic cells and reduce their manufacturing costs. Research limitations/implications: Dye-sensitized solar cells research develop in the direction to increase their efficiency and reduce manufacturing costs, among others, by modifying the chemical composition and structure of the main components: photoanode and counter electrode. Using one of the most expensive materials in the world - a platinum as a catalytic layer causes a significant increase in production costs. For this reason, it is important to search for new materials that can replace the expensive platinum. Practical implications: Developed in this work producing technology of photoanode and the counter electrode containing reduced graphene oxide is an attractive alternative to dye-sensitized solar cell by reducing the manufacturing cost by eliminating costly layer of platinum while maintaining a relatively high efficiency, high transmittance and low resistance of charge transfer at the interlayer counter electrode/electrolyte. Originality/value: In the paper, the reduced graphene oxide was applied as both photoanode and the counter electrode in dye-sensitized solar cells.

Barwnikowe ogniwa słoneczne z przeciwelektrodą grafenową

100%

Klein M. , Siuzdak K. , Cenian A.

tom nr 1-4

5--9

W niniejszej pracy przedstawiono technologię barwnikowych ogniw słonecznych wykorzystujących jako przeciwelektrodę (katodę) warstwę nanopłatków grafenowych wytworzoną metodą pokrywania natryskowego. Mimo gorszych wartości parametrów ogniwa z warstwą węglową w porównaniu do ogniwa z warstwą Pt, konkurencyjna cena grafenu w stosunku do platyny oraz możliwość poprawy wydajności ogniwa poprzez kontrolę parametrów wytwarzania warstw otwiera szerokie perspektywy dla zastąpienia metalu szlachetnego - materiałem węglowym.

Instalacja fotowoltaiczna z wykorzystaniem najnowszej technologii PV

80%

Fal J. , Stępień W. , Cholewa M.

tom R. 59, nr 10

1093--1096

Praca przedstawia projekt instalacji fotowoltaicznej, w skład której wchodzą technologie barwnikowych ogniw organicznych DSSC oraz krzemowe, wysokowydajne ogniwa typu back-contact. Oba rozwiązania opisano i scharakteryzowano ich zalety oraz wady. Projekt swym zasięgiem obejmuje południowo-wschodnią część budynku „K” Politechniki Rzeszowskiej W pracy przedstawiono również krótką charakterystykę warunków solarnych Rzeszowa na podstawie danych meteorologicznych ze stacji Rzeszów-Jasionka. Korzystając z oprogramowania PVSOL przeprowadzono symulację systemu pod kątem potencjalnych zysków energii, które porównano z aktualnymi potrzebami energetycznymi budynku.

The paper presents the design of photovoltaic installation, which covers the south-eastern part of the building "K" of Rzeszów University of Technology. In this building there are rooms of the Department of Physics, being the initiator of the project. This work describes the Polish solar conditions, in particular Subcarpathian (Fig. 1) [3, 4, 11]. In the following characterizes key assumptions the design. There is described the principle of operation of photovoltaic technologies used with the advantages and disadvantages of each of them [15]. The basic parameters of the cells used in the project, together with the Energy Management System are characterized [13]. The paper presents design solutions fixing installations and drawings showing the appearance of the facade covered by installing a PV system (Figs. 4-9). Using the software PVSOL Valentin, the authors performed a simulation of the designed system for potential energy yields and estimated the theoretical efficiency of the installation for the parameters assumed in the project. The results are presented in the form of graphs and compared with the current energy needs of the building (Figs.10-11). Based on the obtained results, it was found that the designed system would only cover about 10% of the building electricity.