Effects of alkali and transition metal-doped TiO 2 hole blocking layers on the perovskite solar cells obtained by a two-step sequential deposition method in air and under vacuum.

Autor: Nwankwo U; Department of Physics and Astronomy, University of Nigeria Nsukka Nigeria fabian.ezema@unn.edu.ng.; Department of Physics/Geology/Geophysics, Alex Ekwueme Federal University Ndufu-Alike Ikwo Nigeria.; Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation 1 Old Faure Road, Somerset West 7129, P.O. Box 722 Somerset West Western Cape Province South Africa.; UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa (UNISA) Muckleneuk Ridge, P.O. Box 392 Pretoria South Africa., Ngqoloda S; Department of Physics and Astronomy, University of the Western Cape Private Bag X17 Bellville 7535 South Africa., Nkele AC; Department of Physics and Astronomy, University of Nigeria Nsukka Nigeria fabian.ezema@unn.edu.ng., Arendse CJ; Department of Physics and Astronomy, University of the Western Cape Private Bag X17 Bellville 7535 South Africa., Ozoemena KI; Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand Private Bag 3, P O Wits Johannesburg 2050 South Africa., Ekwealor ABC; Department of Physics and Astronomy, University of Nigeria Nsukka Nigeria fabian.ezema@unn.edu.ng., Jose R; Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang 26300 Kuantan Pahang Malaysia., Maaza M; Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation 1 Old Faure Road, Somerset West 7129, P.O. Box 722 Somerset West Western Cape Province South Africa.; UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa (UNISA) Muckleneuk Ridge, P.O. Box 392 Pretoria South Africa., Ezema FI; Department of Physics and Astronomy, University of Nigeria Nsukka Nigeria fabian.ezema@unn.edu.ng.; Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation 1 Old Faure Road, Somerset West 7129, P.O. Box 722 Somerset West Western Cape Province South Africa.; UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa (UNISA) Muckleneuk Ridge, P.O. Box 392 Pretoria South Africa.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2020 Apr 01; Vol. 10 (22), pp. 13139-13148. Date of Electronic Publication: 2020 Apr 01 (Print Publication: 2020).
DOI: 10.1039/d0ra01532f
Abstrakt: Planar perovskite solar cells (PPSCs) have received great attention in recent years due to their intriguing properties, which make them a good choice for photovoltaic applications. In this work, the effect of alkali and transition metal-doped TiO 2 (cesium-doped TiO 2 (Cs-TiO 2 ) and yttrium-doped TiO 2 (Y-TiO 2 )) compact layers on the optical, structural and the photovoltaic performance of the PPSCs have been investigated. The perovskite layer syntheses were carried out by depositing a lead iodide (PbI 2 ) layer via spin-coating; converting PbI 2 into methyl ammonium iodide (CH 3 NH 3 PbI 3 ) by chemical vapor deposition (CVD) and spin-coating at 60 min and 60 s conversion times respectively. The as-deposited PPSCs were studied layer-by-layer using an X-ray diffractometer, scanning electron microscope, and UV-vis diffuse reflectance, transmittance and absorbance. The power conversion efficiency for stable processed perovskite solar cells were 3.61% and 12.89% for air and vacuum processed, respectively.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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