Organic photovoltaic devices with concurrent solar energy harvesting and charge storage capability

Arash Takshi; Tete Tevi; Fatemeh Rahimi

doi:10.1117/12.2187671

4 September 2015 Organic photovoltaic devices with concurrent solar energy harvesting and charge storage capability

Arash Takshi, Tete Tevi, Fatemeh Rahimi

Proceedings Volume 9562, Next Generation Technologies for Solar Energy Conversion VI; 95620G (2015) https://doi.org/10.1117/12.2187671
Event: SPIE Optics + Photonics for Sustainable Energy, 2015, San Diego, California, United States

Abstract

Due to large variation of the solar energy availability in a day, energy storage is required in many applications when solar cells are used. However, application of external energy storage devices, such as batteries and supercapacitors, increases the cost of solar energy systems and requires additional charging circuitry. This combination is bulky and relatively expensive, which is not ideal for many applications. In this work, a novel idea is presented for making electrochemical devices with dual properties of solar energy harvesting and internal charge storage. The device is essentially a supercapacitor with a photoactive electrode. Energy harvesting occurs through light absorption at one of the electrodes made of a composite of a conducting polymer (i.e. PEDOT:PSS) and a Porphyrin dye. The energy storage takes place in the both photoactive and counter electrode (CE). We have studied the effect of the CE material on the device characteristics. Using Y-Carbon (a commercial available electrode), an open circuit voltage of 0.49 V was achieved in light across the cell with ~1 mF capacitance. The other two choices for CE were activated carbon and carbon nanotube based electrodes. The cyclic voltammetry and impedance spectroscopy demonstrated that the Y Carbon electrode was a better match.

Conference Presentation

Citation Download Citation

Arash Takshi, Tete Tevi, and Fatemeh Rahimi "Organic photovoltaic devices with concurrent solar energy harvesting and charge storage capability", Proc. SPIE 9562, Next Generation Technologies for Solar Energy Conversion VI, 95620G (4 September 2015); https://doi.org/10.1117/12.2187671

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