上转换发光材料La(OH)3∶Er3+/Yb3+的制备及在染料敏化太阳能电池中的应用  

The Preparation of an Upconversion Luminescent Material La(OH)_3∶Er^(3+)/Yb^(3+) and Its Application in Dye-sensitized Solar Cells

作　　者：吴亚丹 胡圳[1,2] 赵丽 王世敏 董兵海[1,2] 王二静 郭海永[1,2] WU Yadan;HU Zhen;ZHAO Li;WANG Shimin;DONG Binghai;WANG Erjing;GUO Haiyong(Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials,Wuhan 430062;Key Laboratory for the Green Preparation and Application of Functional Materials of Ministry of Education,School of Materials Science and Engineering,Hubei University,Wuhan 430062)

机构地区：[1]有机化工新材料湖北省协同创新中心,武汉430062 [2]湖北大学材料科学与工程学院,功能材料绿色制备与应用教育部重点实验室,武汉430062

出　　处：《材料导报》2018年第5期708-714,共7页Materials Reports

基　　金：国家自然科学基金(51572072;21402045);湖北省自然科学基金重点项目(2015CFA118);湖北省教育厅科学技术研究计划重点项目(D20141006);武汉市科技计划项目(2013010602010209)

摘　　要：针对N719染料仅可吸收可见光这一局限,本研究旨在通过引入上转换发光材料并将其应用于染料敏化太阳能电池的光阳极来拓宽光谱吸收范围,提高光的捕获率,进而达到提高电池光电转换效率的目的。首先,采用水热合成法以不同pH值的先驱体溶液,成功制备了Yb^(3+)/Er^(3+)双掺杂La(OH)_3粉末,然后将适量合成的稀土发光粉掺入TiO_2纳米浆料中,采用刮涂法成膜制备光阳极,并将其组装成染料敏化太阳能电池。研究结果表明,稀土发光粉的加入拓宽了光谱吸收范围,在其掺杂量达到3%时,电池的短路电流密度Jsc提高到17.72mA·cm-2,最终获得了8.3%的光电转换效率。It is universally known that N719 dye can only absorb visible light,which has always been a limitation for its application in dye-sensitized solar cells(DSSCs).In this study,a rare-earth upconversion luminescent material was introduced to broaden the absorption spectrum of N719 sensitized TiO 2 photoanodes,enhance light harvesting efficiency,and further improve the perfor-mance of DSSCs devices.Firstly,the upconversion luminescent material of Yb 3+/Er 3+doped La(OH)3 had been successfully synthesized via the simple hydrothermal method by controlling the pH values of precursor solution.Then,different contents of these Yb 3+/Er 3+doped La(OH)3 powders were further mixed with P25 for the preparations of TiO 2 paste.Finally,the TiO 2 photoanodes with different contents of the upconversion luminescent materials were made by doctor-blade method for further application in DSSCs.As a result,through the introduction of upconversion luminescent materials,the scope of spectral absorption was broadened,and when the doping amount was up to 3%,the highest power conversion efficiency of DSSCs reached 8.3%with the maximum short-circuit current density of 17.72 mA·cm-2.

关 键 词：上转换发光材料 稀土 染料敏化太阳能电池 光阳极 光电转换效率 

分 类 号：TM914[电气工程—电力电子与电力传动]