镍(II)硝酸盐空穴传输层用于单结体异质结有机太阳能电池，效率创纪录地达到 19.02%。

Nickel(II) Nitrate Hole-Transporting Layers for Single-Junction Bulk Heterojunction Organic Solar Cells with a Record 19.02 % Efficiency.

机构信息

School of Chemical Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065, Chengdu, P. R. China.

出版信息

Angew Chem Int Ed Engl. 2023 May 15;62(21):e202301958. doi: 10.1002/anie.202301958. Epub 2023 Apr 13.

DOI:10.1002/anie.202301958

PMID:36930826

Abstract

A facile strategy was developed here to improve the film quality of nickel-based hole transporting layer (HTL) for efficient organic solar cell (OSC) applications. To prevent the agglomeration of Ni(NO ) during film deposition, acetylacetonate was added into the precursor solution, which led to the formation of an amorphous and glass-like state. After thermal annealing (TA) treatment, the film-forming ability could be further improved. The additional UV-ozone (UVO) treatment continuously improved the film quality and increased the work function and conductivity of such HTL. The resulting TA & UVO modified Ni(NO ) & Hacac HTL produced highly efficient organic solar cells with exciting power conversion efficiencies of 18.42 % and 19.02 % for PM6 : BTP-eC9 and D18 : BTP-Th devices, respectively, much higher than the control PEDOT : PSS devices.

摘要

这里提出了一种简便的策略，以改善用于高效有机太阳能电池（OSC）的基于镍的空穴传输层（HTL）的薄膜质量。为了防止在薄膜沉积过程中 Ni(NO3)2 发生团聚，将乙酰丙酮酸盐添加到前体溶液中，这导致形成非晶态和玻璃态。经过热退火（TA）处理后，成膜能力可以进一步提高。额外的紫外-臭氧（UVO）处理不断改善薄膜质量，提高了 HTL 的功函数和电导率。由此产生的 TA 和 UVO 改性的 Ni(NO3)2 和 Hacac HTL 为 PM6:BTP-eC9 和 D18:BTP-Th 器件分别产生了高效的有机太阳能电池，其功率转换效率分别为 18.42%和 19.02%，远高于对照的 PEDOT:PSS 器件。