title: Low-Temperature Solution-Processed SnO2Nanoparticles as a Cathode Buffer Layer for Inverted Organic Solar Cells.
abstract: SnO2recently has attracted particular attention as a powerful buffer layer for organic optoelectronic devices due to its outstanding properties such as high electron mobility, suitable band alignment, and high optical transparency. Here, we report on facile low-temperature solution-processed SnO2nanoparticles (NPs) in applications for a cathode buffer layer (CBL) of inverted organic solar cells (iOSCs). The conduction band energy of SnO2NPs estimated by ultraviolet photoelectron spectroscopy was 4.01 eV, a salient feature that is necessary for an appropriate CBL. Using SnO2NPs as CBL derived from a 0.1 M precursor concentration, P3HT:PC60BM-based iOSCs showed the best power conversion efficiency (PCE) of 2.9%. The iOSC devices using SnO2NPs as CBL revealed excellent long-term device stabilities, and the PCE was retained at ∼95% of its initial value after 10 weeks in ambient air. These solution-processed SnO2NPs are considered to be suitable for the low-cost, high throughput roll-to-roll process on a flexible substrate for optoelectronic devices.
authors.affiliation: School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University , 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.|School of Semiconductor and Chemical Engineering, Chonbuk National University , 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.
authors.forename: Van-Huong
authors.initials: VH
authors.lastname: Tran
authors.affiliation: School of Semiconductor and Chemical Engineering, Chonbuk National University , 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.
authors.forename: Rohan B
authors.initials: RB
authors.lastname: Ambade
authors.affiliation: School of Semiconductor and Chemical Engineering, Chonbuk National University , 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.
authors.forename: Swapnil B
authors.initials: SB
authors.lastname: Ambade
authors.affiliation: School of Semiconductor and Chemical Engineering, Chonbuk National University , 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.
authors.forename: Soo-Hyoung
authors.identifier: http://orcid.org/0000-0002-2730-5723
authors.initials: SH
authors.lastname: Lee
authors.affiliation: School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University , 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.
authors.forename: In-Hwan
authors.initials: IH
authors.lastname: Lee
keywords: SnO2 nanoparticles; cathode buffer layer; inverted organic solar cells; low-temperature synthesis; nanoparticle morphology; solution-processed metal oxide