The need for solar electricity is clear, it is safe, ecologically sound, efficient, continuously available, and is has no moving parts. The basic problem with the use of solar photovoltaic devices is economics, but until recently very little progress has been made toward the development of low-cost photovoltaic devices. The larger part of research funding has been devoted to study of single-crystal silicon solar cells, despite the evidence, including that of the leading manufacturers of crystalline silicon, that the technique holds little promise. The reason for this pattern is understandable and historical. Crystalline silicon is the active element in the very successful semiconductor industry, and virtually all of the solid state devices contain silicon transistors and diodes. Crystalline silicon, however, is particularly unsuitable to terrestrial solar cells.
Crystalline silicon solar cells work well and are successfully used in the space program, where cost is not an
A. analytical and optimistic
B. biased and unprofessional
C. critical and discouraged
D. tentative and inconclusive
The need for solar electricity is
clear, it is safe, ecologically sound, efficient, continuously available, and is
has no moving parts. The basic problem with the use of solar photovoltaic
devices is economics, but until recently very little progress has been made
toward the development of low-cost photovoltaic devices. The larger part of
research funding has been devoted to study of single-crystal silicon solar
cells, despite the evidence, including that of the leading manufacturers of
crystalline silicon, that the technique holds little promise. The reason for
this pattern is understandable and historical. Crystalline silicon is the active
element in the very successful semiconductor industry, and virtually all of the
solid state devices contain silicon transistors and diodes. Crystalline silicon,
however, is particularly unsuitable A. discussing the importance of solar energy B. explaining the functioning of solar cells C. presenting a history of research on energy sources D. describing a possible solution to the problem of the cost of photovoltaic cells 我来回答: 提交
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