TY - JOUR
T1 - Low-temperature solution-processed SnO2 nanoparticles as a cathode buffer layer for inverted organic solar cells
AU - Tran, Van Huong
AU - Ambade, Rohan B.
AU - Ambade, Swapnil B.
AU - Lee, Soo Hyoung
AU - Lee, In Hwan
N1 - Funding Information:
This research was supported by National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT & Future Planning (Grant 2015042417). This research was also supported by the Basic Science Research Program through NRF funded by the Ministry of Science, ICT & Future Planning (Grant 2015R1A2A2A01004404).
PY - 2017/1/18
Y1 - 2017/1/18
N2 - SnO2 recently 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 SnO2 nanoparticles (NPs) in applications for a cathode buffer layer (CBL) of inverted organic solar cells (iOSCs). The conduction band energy of SnO2 NPs estimated by ultraviolet photoelectron spectroscopy was 4.01 eV, a salient feature that is necessary for an appropriate CBL. Using SnO2 NPs 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 SnO2 NPs 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 SnO2 NPs are considered to be suitable for the low-cost, high throughput roll-to-roll process on a flexible substrate for optoelectronic devices.
AB - SnO2 recently 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 SnO2 nanoparticles (NPs) in applications for a cathode buffer layer (CBL) of inverted organic solar cells (iOSCs). The conduction band energy of SnO2 NPs estimated by ultraviolet photoelectron spectroscopy was 4.01 eV, a salient feature that is necessary for an appropriate CBL. Using SnO2 NPs 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 SnO2 NPs 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 SnO2 NPs are considered to be suitable for the low-cost, high throughput roll-to-roll process on a flexible substrate for optoelectronic devices.
KW - Cathode buffer layer
KW - Inverted organic solar cells
KW - Low-temperature synthesis
KW - Nanoparticle morphology
KW - SnO2 nanoparticles
KW - Solution-processed metal oxide
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U2 - 10.1021/acsami.6b10857
DO - 10.1021/acsami.6b10857
M3 - Article
C2 - 27982562
AN - SCOPUS:85018395876
VL - 9
SP - 1645
EP - 1653
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 2
ER -