The 4th International Conference on Science and Sustainable Development (ICSSD2020) was held between 3rd and 5th August, 2020 with the theme “Advances in Science and Technology for Sustainable Development”. The meeting was changed to virtual format because of the Covid-19 pandemic and related issues like ban on large gathering and travel restrictions. The meeting was initially postponed but had to hold virtually because it is an annual conference and with the view of sustaining the purpose of the conference which is to run in line with the SDG goals started in 2017. The Conference was organized by the Department of Physics in conjunction with the Department of Estate Management. The venue for the Conference was Covenant University Centre for Research Innovation and Discovery, Covenant University, Ota, Ogun State, NigeriaProfessor Alison Bruce, Deputy Head, School of Computing, Engineering and Mathematics, University of Brighton, United Kingdom was the Keynote Speaker while Professor Lazarus Ojigi, Director, Mission Planning, Information Technology and Data Management, National Space Research and Development Agency (NASRDA) delivered the Lead Speech. The Plenary Speakers were Professor Ayodele Abiodun and Professor Olayinka Ohunakin. The Vice-Chancellor, Covenant University, Prof. AAA Atayero, delivered an insightful lecture on the impact of Science and Technology during the opening ceremony. There were plenary sessions on day 2 and day 3, followed by discussion and interactions by speakers and attendees. We had four parallel sessions on day 1 and four parallel sessions morning and afternoon on day 2. There was closing ceremony on Day 3 and last set of technical sessions. Authors/presenters were given 10 minutes for presentation each after which questions raised by other participants were answered by the presenters and others also made comments on the presentation. The modality was similar to the physical meeting. Organizers were available on ground, while participants hooked up online from their respective institutions and countries. 55 organizers were on ground, 10 speakers and 152 attendees participated online. The meeting was held on Whova Conference App with Zoom links integrated into it which provided a very robust platform for interaction and feedback from the participants. The technical quality and success of delivery was quite high because Whova Events App was used.The conference consisted of 5 tracks divided into 13 sessions which tackled essential topics on Science, Engineering, Energy, Data, Environment, and allied fields. This conference brought together leaders from industry and academia to exchange and share their experiences, present research results, explore collaborations and to spark new ideas with the aim of developing new projects and exploiting new technology. All the papers presented at ICSSD2020 were re-grouped into 5-topic headings in this volume which are captured under Applied Sciences, Computational Science, Electronics and devices, Energy and Solid State Physics, and Environmental and Earth Sciences.The committee of ICSSD2020 expresses its sincere thanks to all authors for their high-quality research papers and careful presentations. All reviewers are also thanked for their careful comments and advice. Finally, we thank IOP Publication for producing this volume. Mojisola R.Usikalu, Ph.D Chair, ICSSD2020 Organizing Committee Ahzegbobor P. Aizebeokhai, Ph.D Editor-in-Chief, ICSSD2020 Moses E. Emetere, Ph.D Associate Editor I, ICSSD2020 Theophilus A. Adagunodo, Ph.D Associate Editor II, ICSSD2020