| Affiliation: | 1. Department of Physics and Astronomy, University of Nigeria Nsukka, Nsukka, Nigeria;2. National Core Research Centre for Hybrid Materials Solution, Pusan National University, Busan, Republic of Korea;3. Department of Physics and Astronomy, University of Western Ontario, London, Ontario, Canada;4. College of Graduate Studies, University of South Africa (UNISA), Pretoria, South Africa Nanosciences African Network (NANOAFNET), iThemba LABS, National Research Foundation, Somerset West, South Africa;5. Department of Science and Technology, Shivaji University, Kolhapur, India |
| Abstract: | Solar cells incorporated with organic-inorganic lead or tin halide-based perovskite materials as active light-absorber surfaces are referred to as perovskite solar cells (PSCs). This fast advancing solar technology has recorded an increase in its efficiency from 3.8% in 2009 to above 25% in recent years. The technology creates room for diverse device architectures, which enhances further development of thin-film solar cells and photovoltaics. This article reviews the use of nanocrystalline nickel oxide (NiO) film as a hole transport material in PSCs. The literature on pure nickel oxide and doped nickel oxide films has been discussed. The principle of operation, charge separation of PSCs and the various parameters that affect the efficient hole transport mechanisms, power conversion efficiency, growth mechanism, and stability of PSCs have also been discussed. Possible electron-blocking applications and future perspective of nickel oxide films have also been discussed. |
