Irradiance intensity dependence of the lumped parameters of the three-diodes model for organic solar cells. (15th March 2018)

• Record Type: Journal Article
• Authors: Laudani, Antonino; Riganti Fulginei, Francesco; De Castro, Fernando; Salvini, Alessandro
• Is Part Of: Solar energy. Volume 163(2018)
• Page Start: 526
• Page End: 536
• Publication Date: 2018-03-15
• Subjects: Organic solar cells -- PV modeling -- I-V curve -- Circuital model; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2018.02.032
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: Dark condition and its influence on circuital modeling of Organic Solar Cell (OSC) are examined. Dependence on irradiance level of circuital parameters of three diode model for OSC is discussed. A set of formulas for irradiance dependence of three diode circuit for OSC is proposed. Validation of the proposed set of formulas on different OSCs is performed. Abstract: In this paper the current-voltage characteristics of organic solar cells (OSC) is analyzed in terms of equivalent lumped parameter circuit at different level of insolation. In particular, starting from a circuital model based on a three-diode configuration, a set of formulas is proposed to describe the dependence of lumped circuital parameters on irradiance intensity and consequently the behaviour of organic solar cells from dark to high irradiance conditions. These expressions are achieved by using a trail and error approach applied to the fitting procedure of measured I-V curves at different irradiance levels. The achieved model with parameters dependent on irradiance level allows us to use a single circuit for the analysis of OSC under different operating conditions: this is the first step for the integration of OSC circuital model in photovoltaic system simulator, but also can furnish a novel point of view for the advance of the OSC applied research. Experimental measurements are used to setup the model and for its successive validation on two different kind of organic solar cells.