一种背光面黑硅太阳能电池结构及其制作方法

本发明公开了一种背光面黑硅太阳能电池结构，该结构包括：硅基衬底；在硅基衬底正面制作的陷光材料层；以及在硅基衬底背面制作的广谱吸收黑硅材料层。本发明同时公开了一种制作背光面黑硅太阳能电池结构的方法。利用本发明，能充分利用黑硅材料广谱吸收的特点，使进入电池的太阳光几乎能被全部吸收，为光电流作出贡献，解决了传统硅基电池受红外吸收限制，不能吸收和转化1.1μm以上波长太阳光谱的问题，有效提高了硅基太阳能电池的光电转换效率

单片集成电吸收调制分布反馈激光器

提出一种选择区域外延双有源区叠层(SAG-DSAL)结构新技术,基于此技术设计研制了单片集成电吸收调制激光器(EML),SAG-DSAL-EML管芯的阈值电流为20 mA,工作电流为100 mA时的出光功率为10 mW,由吸收调制器(EAM)加-3 V偏压时的消光比为12 dB,实现了简化制作工艺并提高器件性能的预期目的,有望用于规模化生

Key Factors and Techno-Economic Analyses of Manganese Electrolysis Process

从槽液Mn2+浓度、电解时间和过电位关键因素研究电解初期过程，在三电极体系采用计时电量法探讨和优化工艺参数. 研究表明，在不锈钢表面，锰的初期电解析氢显著. 随时间延长，锰逐渐覆盖于不锈钢表面，析氢更困难，其电流效率随之提升，在高过电位区出现极限电流，反应受扩散控制. 在含0.02 g·L-1 SeO2溶液体系中，在40 g·L-1 Mn2+ + 120 g·L-1 (NH4)2SO4、过电位为0.151 V、槽液温度为40 oC、PH为6.6、时间为0.5 h的电解条件下，电流效率可达95.3%；在实用矿粉制液体系，效率也可达81.4%，较企业相同电解体系提高了15%.This paper first studied the key factors affecting the initial manganese electrolysis process, including concentration of Mn2+, electrolysis time, overpotential, and then optimized these processing parameters with the chronocoulometry method under a three-electrode system. The results showed that, during the initial manganese electrolysis process, hydrogen evolution occurred more significantly on the stainless steel surface. As electrolysis process continued, manganese covered the stainless steel surface gradually, and hydrogen evolution reaction restrained which all contributed to the higher current efficiency. Besides, the limiting current density appeared at high overpotential region, and the reaction was controlled by diffusion process. In 0.02 g·L-1 SeO2 solution system with 40 g·L-1 Mn2+ and 120 g·L-1 (NH4)2SO4, electrolysis time of 0.5 h overpotential of 0.151 V, bath temperature of 40 oC, pH of 6.6, the current efficiency was achieved as high as 95.3%. And an efficiency of 81.4% was also realized in the industrialized electrolyte system, which was 15% higher as compared to the previous operation parameters under the same electrolyte system.国家自然科学基金（No. 51304178）资助作者联系地址：中国环境科学研究院，北京 100012Author's Address: Chinese Research Academy of Environment Sciences, Beijing 100012, China通讯作者E-mail：[email protected]