Hybrid Quantum Dot/Organic Heterojunction: A Route to Improve Open-Circuit Voltage in PbS Colloidal Quantum Dot Solar Cells,ACS Energy Letters

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Hybrid Quantum Dot/Organic Heterojunction: A Route to Improve Open-Circuit Voltage in PbS Colloidal Quantum Dot Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-06-22 , DOI: 10.1021/acsenergylett.0c01136
Yannan Zhang ₁ , Yuanyuan Kan ₂ , Ke Gao ₂ , Mengfan Gu ₁ , Yao Shi ₁ , Xuliang Zhang ₁ , Ye Xue ₁ , Xuning Zhang ₃ , Zeke Liu ₁ , Yuan Zhang ₃ , Jianyu Yuan ₁ , Wanli Ma ₁ , Alex K.-Y. Jen ₂

Affiliation

We have successfully demonstrated the effect of a thin organic bulk-heterojunction (BHJ) interlayer on improving the photovoltaic performance of lead sulfide (PbS) colloidal quantum dot (CQD) solar cells. Multiple organic BHJ films with PTB7-Th blending with various N-type acceptors have been introduced as hole-transporting layer (HTL) in PbS solar cells. Significant enhancement in V_oc was achieved in the hybrid devices compared to devices based on conventional HTLs like 1,2-ethanedithiol-treated PbS. Systematic characterizations reveal that the hybrid CQD/organic BHJ architecture can effectively modulate the interfacial charge dynamics and lead to enhanced external quantum efficiency, resulting in a champion efficiency of 12.02%. Solution-processed hybrid CQD/organic architecture may become a universal approach to improve the photovoltaic performance and scalability of PbS CQD solar cells.

中文翻译：

混合量子点/有机异质结：改善PbS胶体量子点太阳能电池中开路电压的途径

我们已经成功地证明了薄有机体异质结（BHJ）中间层对改善硫化铅（PbS）胶体量子点（CQD）太阳能电池的光伏性能的影响。已将PTB7-Th与各种N型受体共混的多种有机BHJ膜作为PbS太阳能电池中的空穴传输层（HTL）。V _oc的显着提高与基于传统HTL的设备（例如1,2-乙二硫醇处理过的PbS）相比，在混合设备中获得了更高的效率。系统表征表明，杂化CQD /有机BHJ体系结构可以有效地调节界面电荷动力学并导致增强的外部量子效率，从而使冠军效率达到12.02％。溶液处理的混合CQD /有机体系结构可能成为提高PbS CQD太阳能电池的光伏性能和可扩展性的通用方法。

更新日期：2020-07-10

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