文档介绍：Rapid introduction of renewable energy is essential in order to meet future energy
demands without further polluting the environment. Solar energy conversion Dharmadasa
plays a very important role in this, but current solar panels based on silicon are
expensive because of the high cost of processing crystalline silicon, a technology I. M. Dharmadasa
that demands high energy consumption. The way forward is to move towards thin-
film solar cells using alternative materials and low-cost manufacturing methods.
The munity is actively researching thin-film solar cells based on
amorphous silicon, cadmium telluride (CdTe), copper indium gallium diselenide
(CIGS), dye-sensitised materials, anic semiconductors/polymers. However,
progress has been slow owing to plications of the physics behind these
devices.
This book concentrates on the latest developments in and understanding of THIN-FILM
device physics underlying thin-film solar cells. The material presented is mainly
experimental and based on CdTe thin-film solar cells. The author extends these
new findings to CIGS- and GaAs-based thin-film solar cells and presents a new
device design based on graded bandgap multilayer solar cells. This design has been
experimentally tested using the well-researched GaAs/AlGaAs system, and initial
≈≈ Advances in
devices have shown impressive device parameters (Voc 1175 mV, FF , and Jsc
≈–2
12 mAcm ). In particular, the Voc represents the highest recorded value together
with the highest possible FF values to date for a single PV device, indicating the
right approach for PV solar cell development. This device is capable of absorbing
all radiation (ultraviolet, visible and infrared) within the solar spectrum as well as CELLS SOLAR
heat energy from the surroundings bines these with “impact ionisation”
and “impurity photovoltaic” effects. The conversion efficiency of graded bandgap
device has improved to ~20% using only two growth attempts. The