Improving the stability and limiting the recombination of planar perovskite PV cells by interfacial engineering

Neeti Tripathi^a, Kenjiro Miyano^a, Masatoshi Yanagida^a^,^b, Yasuhiro Shirai^a^,^b, Liyuan Han^b

^aNational Institute of Material Science (NIMS), JAPAN, National Institute of Material Science (NIMS), Organic/ Inorganic hybrid photovoltaic group, 1-1 Namiki, Tsukuba, Ibaraki, Tsukuba, 3050044

^bNational Institute of Material Science (NIMS), JAPAN, National Institute of Material Science (NIMS), Organic/ Inorganic hybrid photovoltaic group, 1-1 Namiki, Tsukuba, Ibaraki, Tsukuba, 3050044

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Neeti Tripathi, 123
Publication date: 5th February 2015

A rapid advancement in hybrid-perovskite solar cells (PSCs) have shown tremendous potential to solve the energy problems, owing to the advantages of spectacular opto-electronic properties, low cost and easy processing methodologies. Though, conventional DSSC type has been the most acceptable architecture to produce the high efficiency devices, an inverted structure similar to those employed in polymer solar cell is capable of producing devices with non-hysteretic I-V characteristics. In a typical configuration, an inverted structureconsists of PEDOT:PSS as a hole transporting layer, perovskite as a light absorber and PCBM as an electron transporting layer. Though, recent updates demonstrated the convincing performance in inverted type solar cell, corrosive and hygroscopic nature of PEDOT:PSS causes a sever chemical instability and non-uniform charge extraction at PEDOT:PSS/perovskite interface, thus limiting the device performance and stability. Here, we examine the effect of an additional hole selective/electron blocking layer on the photovoltaic performance and stability of planar structured perovskite solar devices with configuration ITO/PEDOT:PSS/Perovskite/PCBM/Ag. An ultra-thin layer of conjugated polymer is employed between the PEDOT:PSS and perovskite layer and a detailed study on the structural properties of perovskite layer, device performance and stability are discussed. Structural investigations suggest that, an additional layer of conjugated amine polymer helps in controlling the growth of perovskite crystals by preventing the crystallization of PbI₂. Moreover, retardation of charge recombination at PEDOT:PSS/perovskite interface leads to the PCE > 12% with reproducibility over 85%. To probe the kinetics of recombination, a light intensity dependent current-voltage characteristics were recorded for devices with and without the additional hole selecting layer and results are explained using the ideal diode equation. Our results provide an important progress in solution processed inverted perovskite solar devices, and demonstrated highly stable performance over the period of several months.

nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.

MATSUS

Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.

International Conference on Hybrid and Organic Photovoltaics

International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.

Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics

The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.

International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics

The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.