Practical solar energy solutions must not only reduce the cost of the module,but also address the substantial balance of system costs.Here,we demonstrate a counter-intuitive approach based on gallium arsenide solar ce...Practical solar energy solutions must not only reduce the cost of the module,but also address the substantial balance of system costs.Here,we demonstrate a counter-intuitive approach based on gallium arsenide solar cells that can achieve extremely low-cost solar energy conversion with an estimated cost of only 3% that of conventional gallium arsenide solar cells using an accelerated,non-destructive epitaxial lift-off wafer recycling process along with a lightweight,thermoformed plastic,truncated mini-compound parabolic concentrator that avoids the need for active solar tracking.Using solar cell/concentrator assemblies whose orientations are adjusted only a few times per year,the annual energy harvesting is increased by 2.8 times compared with planar solar cells without solar tracking.These results represent a potentially drastic cost reduction in both the module and the balance of system costs compared with heavy,rigid conventional modules and trackers that are subject to wind loading damage and high installation costs.展开更多
研究了低压化学气相沉积法(Low-Pressure Chemical Vapor Deposition,LPCVD)制备TOPCon电池用多晶硅层的原理及优劣。TOPCon电池是一种高效率、低成本、适用于规模化生产的n型电池,其背面钝化层采用了隧穿氧化层与n型多晶硅层的叠层结构...研究了低压化学气相沉积法(Low-Pressure Chemical Vapor Deposition,LPCVD)制备TOPCon电池用多晶硅层的原理及优劣。TOPCon电池是一种高效率、低成本、适用于规模化生产的n型电池,其背面钝化层采用了隧穿氧化层与n型多晶硅层的叠层结构。LPCVD法作为制备TOPCon电池背面多晶硅层的一种重要方法,其工艺原理简单、成膜速率快、市场应用广,但该方法存在绕镀问题,需要复杂的绕镀清洗工艺;石英件耗材更换频繁、价格昂贵,增加了电池成本。综合计算成本结果可知,LP法相较于PECVD法,电池单瓦成本略低0.01元/W;LPCVD法相较于PVD法,电池单瓦成本略高0.003元/W。展开更多
文摘Practical solar energy solutions must not only reduce the cost of the module,but also address the substantial balance of system costs.Here,we demonstrate a counter-intuitive approach based on gallium arsenide solar cells that can achieve extremely low-cost solar energy conversion with an estimated cost of only 3% that of conventional gallium arsenide solar cells using an accelerated,non-destructive epitaxial lift-off wafer recycling process along with a lightweight,thermoformed plastic,truncated mini-compound parabolic concentrator that avoids the need for active solar tracking.Using solar cell/concentrator assemblies whose orientations are adjusted only a few times per year,the annual energy harvesting is increased by 2.8 times compared with planar solar cells without solar tracking.These results represent a potentially drastic cost reduction in both the module and the balance of system costs compared with heavy,rigid conventional modules and trackers that are subject to wind loading damage and high installation costs.
文摘研究了低压化学气相沉积法(Low-Pressure Chemical Vapor Deposition,LPCVD)制备TOPCon电池用多晶硅层的原理及优劣。TOPCon电池是一种高效率、低成本、适用于规模化生产的n型电池,其背面钝化层采用了隧穿氧化层与n型多晶硅层的叠层结构。LPCVD法作为制备TOPCon电池背面多晶硅层的一种重要方法,其工艺原理简单、成膜速率快、市场应用广,但该方法存在绕镀问题,需要复杂的绕镀清洗工艺;石英件耗材更换频繁、价格昂贵,增加了电池成本。综合计算成本结果可知,LP法相较于PECVD法,电池单瓦成本略低0.01元/W;LPCVD法相较于PVD法,电池单瓦成本略高0.003元/W。
