Research on New Technologies of Photoelectric Conversion Efficiency in Solar Cell
Tianze LI, Chuan JIANG, Cuixia SHENG School of Electric and Electronic Engineering Shandong University of Technology
Zibo 255049 ,China
e-mail: ltzwang@
Hengwei LU,Luan HOU, Xia ZHANG School of Electric and Electronic Engineering Shandong University of Technology
Zibo 255049 ,China
e-mail: henrylu007@
Abstract—The characteristics of the solar energy and three conversion mode of solar energy including photovoltaic conversion, solar thermal conversion, and photochemical conversion are represented in this paper. On this basis,the materials used in solar cell, as well as the working principle of solar cells, the factors of low convert efficiency of solar cells and the two major bottlenecks encountered in the solar application are analyzed.The idea that spontaneous arrangement of compound organic molecules is achieved by changing the molecular arrangement structure of the organic thin-film solar is put forward. The new structure of liquid crystal layer come into being accordingly so that the electron donor and the receptor molecules of the mixture are separated, and the contacting area between them is enlarged. So the efficiency solar photovoltaic is improved. The research and development of this new technology can solve the technical problem of the low conversion efficiency of solar cell, and open up an effective way to improve the conversion efficiency of solar cells. At last,the prospect of solar photovoltaic technology, solar energy exploit technology and the development of industry is offered in the article.
Keywords- photoelectric conversion efficiency; electron donor and recipient; photovoltaic generate power technology
I.I NTRODUCTION
Energy is the material basis of human society survival and development. In the past 200 yearsˈthe energy system based on coal, oil, natural gas and other fossil fuel has greatly promoted the development of human society. However,
material life and spiritual life is increasing, the awareness of serious consequences brought from the large-scale use of fossil fuels is increasing at the same time: depletion of resources, deteriorating environment, in addition to all of the above, it induce political and economic disputes of a number of nations and regions, and even conflict and war. After in-depth reflection of the development process of the past, human advance seriously the future path of sustainable development. Today in the 21st century, there is no a problem as important as a sustainable energy supply, especially for the benefit of solar energy development and has been highly concerned by all mankind. Around the world are faced with limited fossil fuel resources and higher environmental challenges, it is particularly important to adhere to energy conservation, improve energy efficiency, optimize energy structure, rely on scientific and technological progress, development and utilization of new and renewable sources.After analyzing two bottleneck problems which affect the conversion efficiency of the solar cell, we put forward a new structure of molecular arrangement of the solar cell to improve the conversion efficiency of the solar cell.
II.T HE F EATURES O F S OLAR A ND T HREE C ONVERSION
M ODES
A.The Features of Solar
Solar resources are solar radiation energy on the entire surface of the earth. Solar energy has four features. Firstly, solar energy is sufficient. The gross of solar radiation energy on the surface of the earth is about 6h1017kWh every year. It can be used several billions of years, which is reproducible and cleanest. It isn’t monopolized by any groups or coutries. Secondly, the energy density of solar energy is low. People want to obtain higher energy density by condensers. Thirdly, because of climatic change, the solar energy is mutative. For example, cloudy day and rainy day, the solar energy is weak. People should consider energy storage or use auxiliary devices which provide conventional energy to use solar energy in a row. Forthly, because of the earth rotation, the earth revolution and the angle between the axis of rotation and the orbital plane, days and sensons must change on the earth, solar energy must change too. Fifthly, use of solar energy can make energy level appropriate allocation, so heat energy is made used of. When the sun light shines on the earth, part of the light is reflected or scattered, some light is absorbed, only about 70% of the light which are direct light and scattered light passes through the atmosphere to reach the surface of the earth. Part of the light on the surface of the earth is absorbed by the objects surface, another part is reflected into the atmosphere. Fig.1 shows the schematic diagram of the sun incident on the ground.
Figure1. Schematic diagram of the sun incident on the ground
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