【二维材料专题】光电转化&光致变色
光可谓非常神奇，具有波粒二象性，当光与二维材料相互作用，会发生哪些神奇现象？请看今天的2篇推送文章！
提前预告，下期将为大家推送：二维材料的电催化。
光电转化
Heterojunction solar cells based on graphene woven fabrics and silicon
基于石墨烯织物和硅的异质结太阳能电池
Authors: Zhe Yan, Xuexia He*, Liaona She, Jie Sun, Ruibing Jiang, Hua Xu, Feng Shi, Zhibin Lei, Zong-Huai Liu**
Volume 4, Issue 2, Pages 135-138
Graphene-on-semiconductor has been proved to be a quality heterojunction with efficient photoelectric conversion.
石墨烯-半导体异质结已被证明具有高光电转换效率。
In this work, we constructed Schottky junction solar cells by combing graphene woven fabrics (GWFs) and n-doped single crystal silicon, and examined the performance of solar cells when GWFs of different meshes were used.
在这项工作中，我们通过结合石墨烯织物（GWFs）和n型掺杂单晶硅构建肖特基结太阳能电池，并且检验了使用不同网格的GWF时太阳能电池的性能。
Sparse GWFs possessed high optical transparency but led to poor carrier collection, whereas dense GWFs could collect carriers efficiently but generated too few photo carriers due to low transparency.
稀疏的GWF具有高度的光学透明度，但是载流子收集性能不佳。而致密的GWF可以有效地收集载体，但由于透明度低，产生的光生载流子很少。
The GWFs with an optimal mesh could provide a good balance between the generation and collection of photo-induced carriers to deliver high power conversion efficiency.
具有最佳网格的GWF可以在光生载流子的产生和收集之间提供良好的平衡，以提供高转换效率。
文中部分图片：
(a)-(c)结合石墨烯织物和n型硅的肖特基结太阳能电池
(d)-(f)载流子数量和收集
(g)-(i)显微形貌
Fig. 1. (a–c) Schematic illustration of a solar cell based on n-Si and GWFs of (a) sparse mesh, (b) optimal mesh, and (c) dense mesh. (d–f) Schematic illustration of carrier amount and carrier collection of (d) sparse, (e) optimal, and (f) dense mesh. (g–i) The optical microscope image of (g) 90 mesh, (h) 120 mesh, and (i) 180 mesh GWFs.
电性能
Fig. 2. (a) Current–voltage curves of GWFs/Si solar cells. (b–e) Variation of (b) short circuit current density (Jsc), (c) open circuit voltage (Voc), (d) fill factor (FF), and (e) PCE, with the mesh number of the GWFs.
聚乙烯醇固态电解质改性石墨烯织物和n型硅复合太阳能电池
Fig. 3. (a) Schematic illustration and sectional view of PVA solid electrolyte modified GWFs/Si solar cell. (b) Light J–V curve of GWFs/Si solar cell before and after spin-coating solid electrolyte.
想查看或下载全文？请点击文末的“阅读全文。
光致变色
Two-dimensional tungstate nanosheets for constructing novel photochromic hydrogel with ultrahigh flexibility
用于构建具有超高柔韧性的新型光致变色水凝胶的二维钨酸盐纳米片
Authors: Na Liu, Sai Liu and Fengxia Geng*
Volume 4, Issue 2, Pages 144-148
A hydrogel possessing interesting photochromic behaviors was developed by in situ ultraviolet (UV) irradiation–assisted polymerization of an aqueous solution of N-isopropylacrylamide monomer in the presence of cesiumtungstate nanosheets.
通过在N-异丙基丙烯酰胺单体的水溶液的原位紫外（UV）辐射辅助聚合中引入钨酸铯纳米片，我们开发了具有有趣光致变色行为的水凝胶。
By this process, ahierarchical porous network structure was finely constructed while showing ultra-high flexibility.
通过这个过程，精细地构造了分层多孔网络结构，该结构同时显示出超高的柔韧性。
More importantly, the newly prepared hydrogel retained the photochromic properties of the cesium tungstate nanosheets.
更重要的是，新制备的水凝胶保留了钨酸铯纳米片的光致变色特性。
The color transitions could be readily controlled by UV laser irradiation and were completely reversible vialaser exposure or dark treatment.
颜色转变可以通过UV激光照射容易地控制，并且颜色转变通过激光曝光或黑暗处理后完全可逆。
The nanocomposite hydrogel with its excellent photochromic properties and ultrahigh flexibility will have great applicationsin flexible photochromic devices.
纳米复合水凝胶具有优异的光致变色性能和超高的柔韧性，在柔性光致变色器件中具有很好的应用前景。
The synthetic procedure is simple and has promises to be extended to developing other hydrogels with various new functionalities.
合成过程简单，并有望扩展到其他具有各种新功能的水凝胶的研发。
想查看或者下载全文？全文链接如下
https://www.sciencedirect.com/science/article/pii/S2352847818300157
最后再向大家介绍一下我们闪亮亮的JMAT期刊。它的全称是Journal of Materiomics，是由中国硅酸盐学会和Elsevier合作出版的英文期刊,现已在ScienceDirect上发布了第四卷第四期（2018年），点击文末“阅读全文“可自由获取所有论文全文。
Journal of Materiomics 为同行评议期刊,被web of science和scopus收录，截至目前，最新cite score为7.27，从投稿到在线出版一般只需60天，并且对作者免收发表费！ 投稿说明详见https://www.journals.elsevier.com/journal-of-materiomics/, 期望大家不吝赐稿
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