Expression of concern: Optimized Cu-doping in ZnO electro-spun nanofibers for enhanced photovoltaic performance in perovskite solar cells and photocatalytic dye degradation

Affiliations

• ¹ Department of Energy and Environment Engineering, The Catholic University of Korea 43-Jibong-ro Bucheon-si 14662 Republic of Korea.
• ² Department of Physics, Government College Women University Faisalabad Pakistan.
• ³ School of Engineering and Technology, National Textile University Faisalabad Pakistan [email protected].
• ⁴ Department of Organic and Nano Engineering, Hanyang University 222 Wangsimni-ro, Seongdong-gu Seoul 04763 Republic of Korea.
• ⁵ Department of Chemical Engineering, University of Engineering and Technology Peshawar Pakistan.
• ⁶ Department of Chemistry, Faculty of Applied Science, Umm Al Qura University Makkah 24230 Saudi Arabia [email protected].
• ⁷ Department of Physics, College of Science, King Khalid University Abha Saudi Arabia.