Resonance energy transfer from PbS colloidal quantum dots to bulk silicon: the road to hybrid photovoltaics
Resonance energy transfer from PbS colloidal quantum dots to bulk silicon: the road to hybrid photovoltaics
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从 PbS 胶体量子点到体硅的共振能量转移：混合光伏之路
DOI：
10.1117/12.908357
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Andreakou P
中科院分区：
文献类型：
--
作者：
Andreakou P
半导体量子点可以吸收从可见光到近红外的光，单个被吸收的光子可以产生多个激子，是一种很有前途的光伏应用材料。然而，这些材料的载流子迁移率很低，这严重限制了有效的电荷提取和载流子传输的前景。我们利用量子点的光学性质，通过使用混合光伏器件来克服它们的缺点。这种光伏配置利用量子点对太阳光子的吸收，并将激子从量子点转移到硅的p-n结。我们研究了从量子点向硅p-n结的耗尽层注入激子的共振能量转移(RET)机制。将硫化铅(PbS)纳米晶沉积在硅衬底上，研究了PbS纳米粒子向体硅的共振能量转移(RET)效率。我们通过改变PbS纳米晶和硅之间的分离距离来研究它们之间的这种转移通道的效率。这些结果证明了RET从胶体量子点到体硅。温度测量结果表明，室温下RET效率高达44%。这种混合光伏设备为实现高效和低成本的太阳能电池平台提供了一种潜在的廉价方案。
Semiconductor Quantum Dots (QDs) are promising materials for photovoltaic applications because they can be engineered to absorb light from visible to near infrared and single absorbed photons can generate multiple excitons. However, these materials suffer from low carrier mobility, which severely limits the prospects of efficient charge extraction and carrier transport. We take advantage of the optical properties of QDs and overcome their drawback by using a hybrid photovoltaic device. This photovoltaic configuration exploits the absorption of solar photons in the QDs and the transfer of excitons from the QDs to a silicon p-n junction. We study the Resonance Energy Transfer (RET) mechanism to inject excitons from the QDs into the depletion layer of a silicon p-n junction. Lead sulphide (PbS) nanocrystals are deposited onto the silicon substrate and the efficiency of Resonance Energy Transfer (RET) from the PbS nanoparticles to bulk silicon is investigated. We study the efficiency of this transfer channel between the PbS nanocrystals and silicon by varying their separation distance. These results demonstrate RET from colloidal quantum dots to bulk silicon. Temperature measurements are also presented and show that the RET efficiency is as high as 44% at room temperature. Such a hybrid photovoltaic device makes a potentially inexpensive scheme for achieving highefficiency and low-cost solar-cell platforms.
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影响因子：
--
作者：
FORSTER, T
通讯作者：
FORSTER, T
影响因子：
4
作者：
Rohrmoser, Stefan;Baldauf, Julia;Watson, Ian M.
通讯作者：
Watson, Ian M.
关于能量转移现象的两个想法：涉及 OH 伸缩模式的离子对效应和光伏电池的敏化
DOI：
--
发表时间：
1979
期刊：
影响因子：
--
作者：
D. L. Dexter
通讯作者：
D. L. Dexter
影响因子：
10.8
作者：
Lu, Siyuan;Madhukar, Anupam
通讯作者：
Madhukar, Anupam