Wang Junkun, Guo Jiansen, Liang Jiehui, Guo Chaoying, Mo Youtian, Liu Peixin, Xie Shaohua, Wang Wenliang, Li Guoqiang
State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China.
Department of Electronic Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Nano Lett. 2024 Oct 2;24(39):12111-12117. doi: 10.1021/acs.nanolett.4c02861. Epub 2024 Sep 20.
GaAs heterojunction solar cells are known as promising substitutions for traditional GaAs solar cells for their low cost and performance potential. Nevertheless, the further performance enhancement is hindered by insufficient spectral absorption and nonradioactive recombination. In this work, an InP quantum dot (QD) modified GaAs/PEDOT:PSS solar cell is designed to enhance spectrum utilization and suppress the nonradioactive carriers loss and the solar cell efficiency at 15.08% is achieved. Furthermore, InP QDs used in this work are synthesized by a novel hydrothermal method. During the synthesis process, β-cyclodextrin (β-cyc) was introduced into the reactants and acted as a reaction cell, isolating water and oxygen, enabling the reaction to proceed in ambient air. InP QDs synthesized by this method can achieve band engineering by altering reactant ratios, thereby effectively serving as both a Luminescent Solar Concentrator (LSC) and a Front Surface Field (FSF) in GaAs/PEDOT:PSS solar cells. This work demonstrates an inspiring way to synthesize InP QDs and optimize the performance of GaAs hybrid solar cells.
砷化镓异质结太阳能电池因其低成本和性能潜力，被认为是传统砷化镓太阳能电池的有前途的替代品。然而，光谱吸收不足和非辐射复合阻碍了其性能的进一步提高。在这项工作中，设计了一种磷化铟量子点（QD）修饰的砷化镓/聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）太阳能电池，以提高光谱利用率并抑制非辐射载流子损失，实现了15.08%的太阳能电池效率。此外，本工作中使用的磷化铟量子点是通过一种新型水热法合成的。在合成过程中，将β-环糊精（β-cyc）引入反应物中，作为反应池，隔离水和氧气，使反应能够在环境空气中进行。通过这种方法合成的磷化铟量子点可以通过改变反应物比例实现能带工程，从而有效地在砷化镓/聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐太阳能电池中同时作为发光太阳能聚光器（LSC）和前表面场（FSF）。这项工作展示了一种合成磷化铟量子点和优化砷化镓混合太阳能电池性能的鼓舞人心的方法。
