Highly-efficient and low-temperature perovskite solar cells by employing a Bi-hole transport layer consisting of vanadium oxide and copper phthalocyanine

Chemical Communications : Chem Comm
Ting LeiZhaoxin Wu

Abstract

In this article, an inorganic-organic bilayer hole transport layer (B-HTL) is designed and utilized in planar perovskite solar cells. Here the B-HTL consists of an inorganic VOx matrix and a copper phthalocyanine (CuPc) buffer layer, providing excellent resistance to moisture as well as the alignment of the interfacial energy level. Benefiting from this typical HTL, an enlarged built-in potential and charge extraction can be achieved in PSCs simultaneously. Correspondingly, a champion device with a B-HTL shows a 16.85% efficiency with negligible hysteresis, which is superior to that of a PSC based on a PEDOT:PSS HTL. Meanwhile, significantly prolonged stability of the PSC with the B-HTL can be observed, exhibiting only a 10% efficiency loss after 350 hours in ambient air. Moreover, such an entirely low-temperature (≤60 °C) fabrication process of this typical PSC exhibits its successful application in flexible devices.

References

Apr 16, 2009·Journal of the American Chemical Society·Akihiro KojimaTsutomu Miyasaka
Apr 14, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Yaqiu JiangXun Hou
Jun 7, 2016·Chemical Communications : Chem Comm·Haocheng SunYaoguang Rong
Mar 24, 2017·ACS Applied Materials & Interfaces·Jin-Miao WangLiang-Sheng Liao

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