Nowadays, thin-film solar cells potentially offer a suitable technology for solving the energy production problem with an environmentally friendly method. Besides, thin film technologies show advantages over their bulk-semiconductor counterparts due to their lighter weight, flexible shape and device fabrication schemes and low cost in large-scale industrial production. Although many books currently exist on general concepts of PV materials and devices, few are offering a comprehensive overview of the fast development in thin film Cu(In,Ga)Se2-based solar cells. “Key Developments in CuInGaSe2 Thin Film Solar Cell” would provide an international perspective on the latest research on this topic. It presents a wide range of scientific and technological aspects on basic properties and device physics of high-efficiency CIGS solar cells from the last research frontier point of view. The book was designed for photovoltaic researchers and scientists, students and engineers, with the mission to provide knowledge of the mechanisms, materials, devices, and applications of CIGS-based technology necessary to develop cheaper and cleaner renewable energy in the coming years.
The development of thin-film technologies from the standpoint of high-efficiency, low-cost and environmentally-safe solar photovoltaic cells is still the main focus of considerable amount of research works around the world. The most promising candidate is polycrystalline Cadmium Telluride (CdTe) thin-film solar cell because of its excellent photovoltaic properties as a thin-film absorber as well as low fabrication cost. The focus of this book is to contribute in developing novel techniques to achieve higher efficiency approaching towards the attainable conversion efficiency. Efforts are made to establish CdTe solar cells with different configurations as the potential candidate for near future. As the latent efficiency is yet to be accomplished with even the most recently developed technologies, several novel device structures concerning CdTe thin film solar cells have been proposed with all possibilities being explored in this book. The investigations covered here may lead these innovative ideas with experimental outcomes to real perfection in attaining higher conversion efficiency along with commercial potential, economic feasibility as well as environmental friendliness.
Original Xiaomi Flexible USB Cooler Cooling Portable Mini Fan For Power Bank Notebook Laptop Computer Power-saving Product Description: Lightweight portable removable, detachable design, can be placed in the pocket of a small fan. High-grade silicone material, environmentally safe and feel good. Standard USB interface, can mix and match digital devices, such as: mobile power, desktop computers, laptops, USB connector, car charger and so on, plug and play. Parameters: When the fan is running low noise, maximum noise only 25.8 db, equivalent to the sound of a gentle breeze. Very low power consumption, with millet mobile power, can work for up to 62 hours. Size: 145.5 * 15 * 89.3 mm With millet mobile power when the fan category and continue to work longer: With millet mobile power category Millet portable fans continue to work long Millet mobile power 5000mAh 20 hours Millet mobile power 10000mAh 38 hours Millet mobile power 16000mAh 62 hours Package list: 1x Xiaomi USB Fan More detail:
PV modules are tested by their manufacturers at STCs of 1000W/m2 solar irradiance and 25oC module temperature. However, the actual operating conditions of theses modules, usually vary from the STCs. In this work, climate data recorded for 8 cities of Nigeria have been used to stimulate the module temperatures and electrical outputs of 3 module types of 100W each. The results gotten were analyzed and the cities with high ambient temperature and low wind speed had high module temperature, lower Voc and efficiency, than the cities with lower ambient temperature and higher wind speed. High solar irradiation cities recorded high Isc and max power. The stimulated results were used to estimate the pv array size for a typical Nigerian home and values compared with RETScreen results.
Thin-film silicon solar cell is a promising technology for solar energy due to their low-cost large-scale manufacturability, but one of the major challenges is to absorb light at infrared wavelengths where the absorption length is much larger than the active layer thickness. This book overviews the state-of-the-art light trapping technology for efficiency improvement in thin-film Si solar cells. we propose an all-dielectric, textured photonic crystal (TPC) as an effective light trapping scheme, which integrates dielectric gratings and a distributed Bragg reflector (DBR) in the backside of thin film silicon. We understand the operation principles for this design by using photonic band theories and electromagnetic wave simulations. We also developed a self-assembled method to fabricate the proposed photonic structures. Finally, we explored the fundamental performance limits for thin-lm Si solar cells.
This stylish LED light is perfect for reading, working, traveling and much more! It can be used on both desk and bedside table, very convenient. Features Unique portable bendable design. Soft light lampshade, protect eyesight. Ultra bright with low power consumption. Compatible with laptop, desktop, power bank with USB port. Random color as availability. Specifications Rated Voltage 5V Rated Power 1.2W Material Silicone Light Color White Body Color Black/Yellow/White/Blue/Orange/Purple/Pink/Green (Random color) Product Size 16.8 x 1.8 x 1 cm Package Contents 1 x Mini USB LED Light
Creation of Life Necessity - Power strips need improvement. Three self-adaption 1A/2A USB charging ports are added to the strip. By using high quality materials, customizing the core components and optimizing the structure, finally it makes 50% smaller than the normal strips. Concise and delicate as ornaments of your house. Features Three USB Ports Automatically adjust current for different devices (2A Quick Charge supported). With 82% power conversion rate and 20μA leakage protection, it is efficient and safe power strip. Internal Structure Material Uses Tin Phosphor Bronze, with good elasticity, strong electric conductivity and high wear-resistance. Triple Protection 10A over-load protection, 750℃ flame retardant temp and 75N safety doors keep the children stay way from the danger. Non-Slip Pads on Four Feet Can be placed on any flat surface, always maintain concise appearance and apply to all occasions. Mini Pencil Case Size Thin to 26mm, covers an area of only 50% of the normal six socket strips. Specifications Band Xiaomi Overload Protection 10A Rated input 10A,250V Rated output 10A,250V Rated power 2500W USB module input 100-240V,50/60Hz,0.5A USB module output Single USB,5V 2.1A(TYP) Three USB 5V 3.1A(TYP) Use of the environment temperature -10℃~+40℃ Flame retardant 750℃ Safety resistance 75N Cable Length 1.8M Product Weight 300g Product Size 22.5 x 4.1 x 2.6 cm Package Weight 350g Package Size 30 x 8 x 5 cm
DRF4463F is a type of low cost RF front-end transceiver module based on SI4463. It keeps all the advantages of RFIC SI4463 but simplifies the circuit design. The high sensitivity (-126dBm) and 20dBm high power output make the module suitable for most short range applications. DRF4463F module consists of RFIC Si4463 thin SMD crystal and antenna matching circuit. The antenna port is well matched to standard 50 Ohm impedance. Users don't need to spend time in RF circuit design and choose suitable antennas for different applications. DRF4463F operates at 1.8~3.6V with extra low standby current which makes it suitable for battery powered-up applications.