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A green synthesis of CISe nanocrystal ink and preparation of quantum dot sensitized solar cells
Functional Materials Letters ( IF 1.3 ) Pub Date : 2020-05-08 , DOI: 10.1142/s1793604720500289
Tianyu Guo 1 , Hui Zhang 1 , Guifeng Chen 1 , Boling Long 1 , Luxiao Xie 1 , Zishuang Cheng 1 , Xinjian Xie 1 , Gudong Liu 1 , Wei Li 2
Affiliation  

I–III–VI chalcopyrite copper indium selenium is one of therepresentatives of the light absorbing layer material, and is often used for a thin-film solar cell. With the development of nano-technology, CuInSe2 quantum dots (CISe QDs) which have intermediate belt and excitation effect characteristics are applied to the solar cells as an alternative of Cd- or S-based QDs. Most conventional methods for the synthesis of CISe QDs using solution involve the dangerous and environmentally unfriendly Oleylamine or phosphine coordination compounds. In this work, CISe QDs were synthesized by a green, safe and low-temperature method in triethylene glycol. Through controlling the growth temperature and time, the diameter can be adjusted from 3[Formula: see text]nm to 10[Formula: see text]nm. The samples exhibit quantum confinement effect, and have a controllable optical band gap. QDs were deposited on the surface of ZnO nanorods to obtain a photoanode, which were fabricated into quantum dot-sensitized solar cells. The device exhibits size-dependent performance. And the open circuit voltage shows a fluctuation up to 0.26[Formula: see text]V. When the size is 4[Formula: see text]nm, the short circuit current density is the largest (15[Formula: see text]mA/cm2).

中文翻译:

CISe纳米晶墨水的绿色合成及量子点敏化太阳能电池的制备

I-III-VI黄铜矿铜铟硒是光吸收层材料的代表之一,常用于薄膜太阳能电池。随着纳米技术的发展,CuInSe2具有中间带和激发效应特性的量子点 (CISe QD) 被应用于太阳能电池,作为 Cd 或 S 基 QD 的替代品。使用溶液合成 CISe QD 的大多数常规方法都涉及危险且对环境不友好的油胺或膦配位化合物。本工作采用绿色、安全、低温的方法在三甘醇中合成了 CISe 量子点。通过控制生长温度和时间,直径可以从3[公式:见文]nm调整到10[公式:见文]nm。样品表现出量子限制效应,并具有可控的光学带隙。将量子点沉积在 ZnO 纳米棒的表面以获得光阳极,将其制成量子点敏化太阳能电池。该器件表现出与尺寸相关的性能。并且开路电压波动高达0.26[公式:见正文]V。尺寸为4[公式:见文]nm时,短路电流密度最大(15[公式:见文]mA/cm2)。
更新日期:2020-05-08
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