Journal
ACS ENERGY LETTERS
Volume 6, Issue 12, Pages 4179-4186Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.1c02124
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Funding
- Taiwan Ministry of Science and Technology [MOST 110-2123-M-A49-001, MOST 110-2634-F-009-026]
- Center for Emergent Functional Matter Science of National Yang Ming Chiao Tung University (NYCU) from The Featured Areas Research Center Program within the Taiwan Ministry of Education (MOE)
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This work presents the first report on a hole-selective tin-based perovskite solar cell using a self-assembled monolayer (SAM) to modify the ITO surface. Through a preheating procedure, a uniform SAM was produced on the ITO surface, leading to improved device performance.
This work is the first report on a hole-selective tin-based perovskite solar cell (PSC) using the concept of a self-assembled monolayer (SAM) to modify the ITO surface to fabricate a uniform tin perovskite layer via a two-step sequential deposition method. Herein, we developed a preheating procedure to diminish effectively the amounts of hydroxyl groups and oxygen vacancies on the ITO surface to produce a uniform SAM. The ITO substrate preheated at 400 degrees C gave the best device performance for an efficiency of power conversion (PCE) reaching 6.5%, and 80% of the initial PCE was maintained in a glovebox for similar to 1900 h. Electrochemical impedance spectra and time-resolved spectra were used to understand the interfacial charge recombination and holeextraction kinetics in relation to the observed device performance. The present work thus provides a new direction for the development of SAM-based lead-free perovskite solar cells for their future scaled-up production.
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