Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 45, Pages 39519-39525Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b12420
Keywords
small molecule solar cell; organic photovoltaic modules; slot-die printing method; halogen-free solvent; halogen free additives
Funding
- National Research Foundation of Korea(NRF) - Korea government [NRF-2015R1A2A1A10054466]
- Korea Institute of Energy Technology Evaluation and Planning(KETEP)
- Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea [20153010012110, 20163030013900]
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For the first time, the photovoltaic modules composed of small molecule were successfully fabricated by using roll-to-roll compatible printing techniques. In this study, blend films of small molecules, BTR and PC71BM were slot-die coated using a halogen-free solvent system. As a result, high efficiencies of 7.46% and 6.56% were achieved from time-consuming solvent vapor annealing (SVA) treatment and roll to-roll compatible solvent additive approaches, respectively. After successful verification of our roll-to-roll compatible method on small-area devices, we further fabricated large-area photovoltaic modules with a total active area of 10 cm(2), achieving a power conversion efficiency (PCE) of 4.83%. This demonstration of large-area photovoltaic modules through roll-to roll compatible printing methods, even based on a halogen-free solvent, suggests the great potential for the industrial-scale production of organic solar cells (OSCs).
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