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Open AccessArticle

Solid-State Solar Cells Based on TiO2 Nanowires and CH3NH3PbI3 Perovskite

1
Department of Electronics Engineering, Dawood University of Engineering and Technology, Karachi 74800, Pakistan
2
Department of Industrial Engineering and Management, Dawood University of Engineering and Technology, Karachi 74800, Pakistan
3
Department of Electrical Engineering, Bahria University Islamabad Campus, Islamabad 44000, Pakistan
*
Author to whom correspondence should be addressed.
Coatings 2021, 11(4), 404; https://doi.org/10.3390/coatings11040404
Received: 2 February 2021 / Revised: 25 March 2021 / Accepted: 30 March 2021 / Published: 31 March 2021
Perovskite inorganic-organic solar cells are fabricated as a sandwich structure of mesostructured TiO2 as electron transport layer (ETL), CH3NH3PbI3 as active material layer (AML), and Spiro-OMeTAD as hole transport layer (HTL). The crystallinity, structural morphology, and thickness of TiO2 layer play a crucial role to improve the overall device performance. The randomly distributed one dimensional (1D) TiO2 nanowires (TNWs) provide excellent light trapping with open voids for active filling of visible light absorber compared to bulk TiO2. Solid-state photovoltaic devices based on randomly distributed TNWs and CH3NH3PbI3 are fabricated with high open circuit voltage Voc of 0.91 V, with conversion efficiency (CE) of 7.4%. Mott-Schottky analysis leads to very high built-in potential (Vbi) ranging from 0.89 to 0.96 V which indicate that there is no depletion layer voltage modulation in the perovskite solar cells fabricated with TNWs of different lengths. Moreover, finite-difference time-domain (FDTD) analysis revealed larger fraction of photo-generated charges due to light trapping and distribution due to field convergence via guided modes, and improved light trapping capability at the interface of TNWs/CH3NH3PbI3 compared to bulk TiO2. View Full-Text
Keywords: perovskite; TiO2 nanowires; electron transport layer; finite-difference time-domain perovskite; TiO2 nanowires; electron transport layer; finite-difference time-domain
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MDPI and ACS Style

Sami, A.; Ansari, A.; Idrees, M.D.; Alam, M.M.; Imtiaz, J. Solid-State Solar Cells Based on TiO2 Nanowires and CH3NH3PbI3 Perovskite. Coatings 2021, 11, 404. https://doi.org/10.3390/coatings11040404

AMA Style

Sami A, Ansari A, Idrees MD, Alam MM, Imtiaz J. Solid-State Solar Cells Based on TiO2 Nanowires and CH3NH3PbI3 Perovskite. Coatings. 2021; 11(4):404. https://doi.org/10.3390/coatings11040404

Chicago/Turabian Style

Sami, Abdul; Ansari, Arsalan; Idrees, Muhammad D.; Alam, Muhammad M.; Imtiaz, Junaid. 2021. "Solid-State Solar Cells Based on TiO2 Nanowires and CH3NH3PbI3 Perovskite" Coatings 11, no. 4: 404. https://doi.org/10.3390/coatings11040404

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