Simulation of I-V Curves for Inverted Structure Perovskite Solar Cells using Equivalent Circuit Model with Inductance
Hiroshi Segawa a, Takaya Kubo a, Jotaro Nakazaki a, Satoshi Uchida a, Ludmila Cojocaru a, Shoji Kaneko b, Piyankarage V. V. Jayaweera b
a SPD Laboratory, Inc., Johoku 2-35-1, Naka-ku, Hamamatsu 432-8011, Japan
Proceedings of Perovskite Thin Film Photovoltaics (ABXPV17)
València, Spain, 2017 March 1st - 2nd
Organizers: Henk Bolink and David Cahen
Oral, Satoshi Uchida, presentation 095
Publication date: 18th December 2016

Physical modeling of hysteretic behavior in I-V curves of perovskite solar cells (PSCs) is necessary for further understanding of power generation mechanism and improvements of power conversion efficiencies (PCEs). In some cases, reduction of hysteresis in planar structure PSC (p-PSCs) has been achieved by using PCBM layer mostly for inverted structure. In such cases, the opposite trend of the I-V hysteresis, where the forward scan shows higher efficiency than that of reverse scan has been observed. In this paper, an equivalent circuit model with inductance was newly proposed. This model consists of Schottky diode (SBD) involving parasite inductance focusing PCBM/Al(Ca) interface and well represents the opposite I-V hysteresis of the p-PSC with inverted structure. Furthermore, based on the equivalent circuit we have constructed physical real device composed of 2 Si photo diodes and a diode, an inductor and resistor. Photovoltaic response for modeled perovskite solar cells based on equivalent circuit with 2 Si photo diodes, a diode, an inductor and resistor. The I-V curves for this device well supported our equivalent circuit having 2 Si photodiode and SBD diode, and conclude that the inverted trend of hysteresis is coming from the inductance originated from the interface PCBM/Al(Ca).

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