Performance enhancement of organic/Si solar cell using CNT embedded hole selective layer. (15th November 2020)

• Record Type: Journal Article
• Authors: Markose, Kurias K.; Jasna, M.; Subha, P.P.; Antony, Aldrin; Jayaraj, M.K.
• Is Part Of: Solar energy. Volume 211(2020)
• Page Start: 158
• Page End: 166
• Publication Date: 2020-11-15
• Subjects: Solar cell -- PEDOT:PSS-CNT/Si -- Hole selective layer -- Composite film; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2020.09.024
• Languages: English
• ISSNs: 0038-092X

Abstract

Graphical abstract: Highlights: PEDOT: PSS-CNT composite prepared by a facile method used as HSL in c-Si solar cell. The device performance was found to vary with the CNT wt.% in the composite film. The junction properties were analysed using EIS measurements. PEDOT: PSS-CNT /Si solar cell obtained an efficiency of 9.05% with a Voc of 588.6 mV. Abstract: In this work, we present a simple and solution-based synthesis approach to combine the virtues of PEDOT:PSS and carbon nanotube (CNT) by developing a composite film and their application as a hole selective layer (HSL) in organic-silicon hybrid heterojunction solar cell. The heterojunction solar cell with the optimised PEDOT: PSS-CNT HSL showed a notable open-circuit voltage ( V oc ) of 588.6 mV, short circuit current density ( J sc ) of 25.3 mA/cm 2 and fill factor (FF) of 60.79% yielding a photo-conversion efficiency ( η ) of 9.05%. The pristine PEDOT:PSS/Si device obtained an η of 6.2% with a V oc of 502 mV. The role of CNT in the charge transport mechanism and improving V oc was corroborated by employing various characterisation methods such as J-V, C-V, and electrochemical impedance spectroscopy. The composite layer induced a strong inversion layer in silicon and enhanced the device performance. The application of PEDOT:PSS-CNT composite film is not limited to c-Si solar cells, but can also be used to fabricate flexible organic and perovskite solar cells.