Micro–meso hierarchical porous carbon as low-cost counter electrode for dye-sensitized solar cells

A micro–meso hierarchical porous carbon with low crystallinity was prepared by a combination of self-assembly and post activation and explored as a counter electrode in dye-sensitized solar cells. Pore structure analysis showed that the pristine mesopores were basically preserved during activation and the micropores were mainly generated within the mesopore wall. Due to its low crystallinity and unique pore-structure including both mesopores and micropores, hierarchical porous carbon exhibited a relatively higher electrocatalytic activity for triiodide reduction, as compared with the pristine mesoporous carbon electrode. This enhanced electrocatalytic activity is beneficial for improving the photovoltaic performance of dye-sensitized solar cells. Under irradiation of 100 mW cm⁻², the dye-sensitized solar cell with hierarchical porous carbon counter electrode showed an overall conversion efficiency of 6.48%, which was 11.5% higher than that of the cell with pristine mesoporous carbon counter electrode.     

可调节室内气候的住宅南向封闭阳台

该文提出按太阳能辐射原理设计的南向封闭阳台，可以成为住宅内部环境与外部环境的气候交换层。有利于节省住宅运营费，并为住房提供良好的生活环境空间，具有生态意义。     

Improvement in open circuit voltage of n‐ZnO/p‐Si solar cell by using amorphous‐ZnO at the interface

Several research groups are currently working on n‐ZnO/p‐Si heterojunction solar cell, and recently, Pietruszka et al [Sol. Energ. Mat. Sol. Cells 147 (2016) 164‐170] has reported the highest efficiency of 7.1% for this structure. The main challenge is to enhance the open circuit voltage up to theoretically predicted value of >0.6 V. This paper reports >20% improvement in open circuit voltage of n‐ZnO/p‐Si solar cell by depositing amorphous‐ZnO at the interface at room temperature that possibly improves the passivation and/or avoids oxide formation at the interface during ZnO deposition. Two other materials, aluminum nitride and amorphous‐Si, have also been used as buffer layers to evaluate their effect on suppression of interface states. Furthermore, additional advantage of ZnO as an antireflector has been experimentally verified for different thicknesses of ZnO film.     

New silicon thin-film technology associated with original DC-DC converter: An economic alternative way to improve photovoltaic systems efficiencies

In this article, we aim at optimizing an innovative tandem structure based on polymorphous and microcrystalline silicon for the top and bottom elementary cells, respectively, combined with an original DC-DC converter.The studied tandem structure is composed of two cells, each being connected to its own separate electrodes making the structure electrically decoupled but optically coupled. In those conditions, the constraint of current matching usually needed in the classical micromorph structures is avoided. As a result, the robustness against the current variations is enhanced and the efficiency of the structure is improved.Since the top cell plays the main role in the determination of the transmitted part of the incoming flux to the bottom cell, the thickness of the intrinsic layer of the polymorphous cell is tuned so that the output power of the global structure becomes maximal.To implement the electric decoupling of two sub cells, the studied structure needs two static converters. In order to minimize the converters bulk, we design an innovative output electric architecture and its optimized related control signals.     

太阳能多相光催化法在废水处理中的应用研究评述

概述了光催化反应动力学研究进展和阻碍太阳能多相光催化工业应用的主要问题及其解决途径。现有的规模化应用表明，太阳能多相光催化法比传统方法处理成本低，研制开发高活性光催化剂、优良的载体、高效太阳能反应器是推动其工业化应用的关键。     

中国多晶硅产业链现状及发展方向

多晶硅是全球电子工业及光伏产业的基石，95％以上的半导体器件和99％以上的集成电路（IC）以及90％的太阳能电池芯片都是由硅材料（合单晶硅及多晶硅）制造的。本文对多晶硅产业链进行了详细的分析和叙述，对中国多晶硅产业现状和产业链存在的问题提出了自己的建议和看法。     

晶硅衬底参数对太阳电池输出特性的影响

利用晶硅电池模拟软件PC1D研究晶硅衬底的厚度、少子寿命及掺杂浓度对电池输出特性的影响规律。结果表明:晶硅衬底的厚度对电池输出特性的影响与其少子的扩散长度有关,衬底厚度的减小有利于其开路电压的提高,存在一最佳厚度值使其转换效率、短路电流及填充因子最高;当少子的扩散长度远大于衬底厚度时,电池的输出特性几乎与衬底厚度无关;当衬底少子扩散长度与衬底厚度的比值为2.5~3.0时,电池的转换效率最高;晶硅衬底的掺杂浓度在5×1015~1×1017cm 3之间,即电阻率在0.2~3.0.cm范围内时,晶硅电池能获得良好的输出特性。