Sadhu Annada Sankar, Huang Yu-Ming, Chen Li-Yin, Kuo Hao-Chung, Lin Chien-Chung
Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
International Ph.D. Program in Photonics (UST), College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
Nanomaterials (Basel). 2022 Mar 16;12(6):985. doi: 10.3390/nano12060985.
The solar cell has a poor spectral response in the UV region, which affects its power conversion efficiency (PCE). The utilization of a luminescent downshifting (LDS) layer has been suggested to improve the spectral response of the photovoltaics in the short wavelength region through photoluminescence (PL) conversion and antireflection effects, which then enhance the PCE of the solar cell. Recently, colloidal quantum dots (CQDs) or perovskite quantum dots (PQDs) have been gaining prime importance as an LDS material due to their eminent optical characteristics, such as their wide absorption band, adjustable visible emission, short PL lifetime, and near-unity quantum yields. However, the instability of QDs that occurs under certain air, heat, and moisture conditions limits its commercialization. Thus, in this review, we will focus on the physical and optical characteristics of QDs. Further, we will discuss different synthesis approaches and the stability issues of QDs. Different approaches to improve the stability of QDs will be discussed in detail alongside the recent breakthroughs in QD-based solar cells for various applications and their current challenges. We expect that this review will provide an effective gateway for researchers to fabricate LDS-layer-based solar cells.
该太阳能电池在紫外区域的光谱响应较差,这影响了其功率转换效率(PCE)。有人提出利用发光向下转换(LDS)层,通过光致发光(PL)转换和抗反射效应来改善光伏器件在短波长区域的光谱响应,进而提高太阳能电池的PCE。近年来,胶体量子点(CQD)或钙钛矿量子点(PQD)因其卓越的光学特性,如宽吸收带、可调的可见光发射、短的PL寿命和近乎单位的量子产率,作为一种LDS材料变得至关重要。然而,量子点在某些空气、热和湿度条件下出现的不稳定性限制了其商业化。因此,在本综述中,我们将重点关注量子点的物理和光学特性。此外,我们将讨论量子点的不同合成方法及其稳定性问题。将详细讨论提高量子点稳定性的不同方法,以及基于量子点的太阳能电池在各种应用中的最新突破及其当前面临的挑战。我们期望本综述将为研究人员制造基于LDS层的太阳能电池提供一个有效的途径。