Khan Mamun Reza, Sally Mabrouk,Qiquan Qiao* Proceedings of the Nature Research Society, Volume 2, Article Number 02004, 2018Published Online: 30 March 2018 (Review)DOI:10.11605/j.pnrs.201802004
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Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) is the most commonly used hole transport layer (HTL) in inverted (p-i-n) structured perovskite solar cells (PSCs) due to remarkable transparency and conductivity. Despite high transparency and conductivity, PEDOT:PSS has some concealed problems such as acidity, hygroscopic nature, lower work function than the ionization potential of perovskite, and poor electron blocking capability. All these properties hinder the efficient charge extraction and transport from perovskite absorber to ITO. In addition, acidic and hygroscopic nature of PEDOT:PSS can corrode the ITO electrode and degrade the moisture sensitive PSK layer, respectively. These can degrade the long-term stability and lower the performance of PSCs. Therefore, tailoring PEDOT:PSS HTL is essential for achieving highly efficient PSCs to mitigate these drawbacks. This review article gives an overview of approaches tailoring PEDOT:PSS that can minimize the limitations as HTL to improve the performance of PSCs. These include solvent treatment, composite structure, doping, and bi-layer structure PEDOT:PSS. In addition, the roles of tailored PEDOT:PSS HTL was understood in perovskite solar cells.
Citation Information: Khan Mamun Reza, Sally Mabrouk,Qiquan Qiao, A Review on Tailoring PEDOT:PSS Layer for Improved Performance of Perovskite Solar Cells , Proceedings of the Nature Research Society, 2018, 2, 02004. doi: 10.11605/j.pnrs.201802004
Received: 15 March 2018, Accepted: 29 March 2018, Published Online: 30 March 2018