Review on NiO thin film as hole transport layer in perovskite solar cell
https://doi.org/10.17586/2220-8054-2021-12-6-703-710
Abstract
The saturation in increasing the power conversion efficiency (PCE) of silicon-based solar cells made researchers around world to look for the alternatives. An alternative solar cell would possess some basic requirements like cost effectiveness, reproducible, durable (stability), non-toxicity and higher efficiency. Perovskite solar cell (PSC) opened the new realm of hope for this alternative, consisting of perovskite absorber sandwich between the hole transport layer (HTL) and the electron transport layer (ETL). Good performance of PSCs can be achieved by optimizing many parameters of the components of PSC for obtaining the highest PCE. Among them, the HTL also plays a very vital role. Previously, organic poly (3,4-ethylenedioxythiophene):poly (styrene sulfonic acid) PEDOT:PSS was being widely used as the HTL in PSCs, but due to its hygroscopic nature and acidic properties, it lowered the stability and the life time of the PSCs. Later it was replaced mostly by NiO, a p-type transparent conducting oxide (TCO) enhancing the PCE of PSCs. Its excellent stability and electrical/optical properties attracted the interest of many researchers. Different types of PSCs used NiO thin films prepared from different synthesis routes and obtained variation in efficiency of PSCs. Different parameters of NiO thin films like thickness, annealing temperature (AT) and duration, precursor combinations and more in synthesis processes, have a significant role in optimizing the PCE. Though there are many routes for obtaining NiO thin film, here we are trying to focus more on sol-gel method, as this route is very cost effective and employs basic equipment. Its evolution, present status and the future perspectives will also be discussed.
Keywords
Supporting agencies: This work was supported by Science & Engineering Research Board (SERB), New Delhi, Sanction Order No. EEQ/2017/000435 dated 17 March, 2018.
About the Authors
Kamal Bhujel
Physical Sciences Research Center, Pachhunga University College; Laser and Photonics Laboratory, Department of Physics, Mizoram University
India
India
Aizawl, 796001;
Aizawl, 796004.
Suman Rai
Laser and Photonics Laboratory, Department of Physics, Mizoram University
India
India
Aizawl, 796004.
Ningthoujam Surajkumar Singh
Physical Sciences Research Center, Pachhunga University College
India
India
Aizawl, 796001.
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Review
For citations:
Bhujel K., Rai S., Singh N.S. Review on NiO thin film as hole transport layer in perovskite solar cell. Nanosystems: Physics, Chemistry, Mathematics. 2021;12(6):703-710. https://doi.org/10.17586/2220-8054-2021-12-6-703-710
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