Jump to main content
Jump to site search


Engineering interface structure between lead halide perovskite and copper phthalocyanine for efficient and stable perovskite solar cells

Abstract

Successful commercialization of perovskite solar cells (PSCs) in the near future will require fabrication of cells with high efficiency and long-term stability. Despite their good processability at low temperatures, the majority of organic conductors employed in the fabrication of high-efficiency PSCs [eg., 2,2′,7,7′-Tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) and Poly(triaryl amine) (PTAA)] have low thermal stability. In order to fabricate PSCs with excellent thermal stability, both the constituent material itself must be thermally stable, and the interface between the constituents must also be thermally stable. In this work, we focused on copper phthalocyanine (CuPC) as a model hole-transporting material (HTM) for thermally stable PSCs since the CuPC is known to possess excellent thermal stability and interfacial bonding properties. The CuPC-based PSCs recorded a high power conversion efficiency (PCE) of ~18% and maintained 97% of its initial efficiency for more than 1000 h of thermal annealing at 85 °C. Moreover, the device was stable under thermal cycling test (50 cycles, -45°C ~ 85 °C). The high PCE and high thermal stability observed in CuPC-PSCs were found to arise as a result of the strong interfacial and conformal coating present on the surface of the perovskite facets, located between CuPC and the perovskite layer. These results will provide an important future direction for the development of highly efficient and thermally stable PSCs.

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Jul 2017, accepted on 14 Sep 2017 and first published on 14 Sep 2017


Article type: Communication
DOI: 10.1039/C7EE01931A
Citation: Energy Environ. Sci., 2017, Accepted Manuscript
  •   Request permissions

    Engineering interface structure between lead halide perovskite and copper phthalocyanine for efficient and stable perovskite solar cells

    Y. C. Kim, T. Yang, N. J. Jeon, J. Im, S. Jang, T. J. Shin, H. Shin, S. Kim, E. Lee, S. Kim, J. H. Noh, S. I. Seok and J. Seo, Energy Environ. Sci., 2017, Accepted Manuscript , DOI: 10.1039/C7EE01931A

Search articles by author

Spotlight

Advertisements