Molecular Engineering in Hole Transport π‐Conjugated Polymers to Enable High Efficiency Colloidal Quantum Dot Solar Cells,Advanced Energy Materials

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Molecular Engineering in Hole Transport π‐Conjugated Polymers to Enable High Efficiency Colloidal Quantum Dot Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-01-10 , DOI: 10.1002/aenm.201902933
Muhibullah Al Mubarok ₁ , Havid Aqoma ₁ , Febrian Tri Adhi Wibowo ₁ , Wooseop Lee ₂ , Hyung Min Kim ₃ , Du Yeol Ryu ₂ , Ju‐Won Jeon ₃ , Sung‐Yeon Jang ₁

Affiliation

Organic p‐type materials are potential candidates as solution processable hole transport materials (HTMs) for colloidal quantum dot solar cells (CQDSCs) because of their good hole accepting/electron blocking characteristics and synthetic versatility. However, organic HTMs have still demonstrated inferior performance compared to conventional p‐type CQD HTMs. In this work, organic π‐conjugated polymer (π‐CP) based HTMs, which can achieve performance superior to that of state‐of‐the‐art HTM, p‐type CQDs, are developed. The molecular engineering of the π‐CPs alters their optoelectronic properties, and the charge generation and collection in CQDSCs using them are substantially improved. A device using PBDTTPD‐HT achieves power conversion efficiency (PCE) of 11.53% with decent air‐storage stability. This is the highest reported PCE among CQDSCs using organic HTMs, and even higher than the reported best solid‐state ligand exchange‐free CQDSC using pCQD‐HTM. From the viewpoint of device processing, device fabrication does not require any solid‐state ligand exchange step or layer‐by‐layer deposition process, which is favorable for exploiting commercial processing techniques.

中文翻译：

空穴传输π共轭聚合物的分子工程，可实现高效的胶体量子点太阳能电池

有机p型材料由于其良好的空穴接受/电子阻挡特性和合成的多功能性，因此可以作为胶体量子点太阳能电池（CQDSC）的可溶液加工的空穴传输材料（HTM）。但是，与传统的p型CQD HTM相比，有机HTM的性能仍然较差。在这项工作中，开发了基于有机π共轭聚合物（πCP）的HTM，其性能可优于最新的HTM p型CQD。π-CP的分子工程改变了它们的光电特性，并大大改善了使用它们的CQDSC中的电荷产生和收集。使用PBDTTPD‐HT的设备可实现11.53％的功率转换效率（PCE），并具有良好的储气稳定性。这是使用有机HTM的CQDSC中报告的最高PCE，甚至高于使用pCQD-HTM所报告的最佳固态无配体交换的CQDSC。从器件加工的角度来看，器件制造不需要任何固态配体交换步骤或逐层沉积工艺，这对于利用商业加工技术是有利的。

更新日期：2020-02-25

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