Journal
ADVANCED MATERIALS TECHNOLOGIES
Volume 2, Issue 5, Pages -Publisher
WILEY
DOI: 10.1002/admt.201600293
Keywords
light-emitting electrochemical cells; light-extracting structures; OLED; printed electronics
Categories
Funding
- MEXT, Japan.
- [24225003]
- [15J00888]
- Grants-in-Aid for Scientific Research [15J00888] Funding Source: KAKEN
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Next-generation, power-efficient organic lighting systems, which ideally would be low-cost and mass-producible, are urgently needed because more than 20% of total electricity use goes to lighting. This study presents polymer light-emitting electrochemical cells (PLECs) made using mass-producible nanoimprinted corrugated substrates, which effectively improve light extraction efficiency. The corrugated substrates are fabricated using roll-to-roll methods, using self-assembled block copolymers on glass and film substrates (glass: 0.45 m x 0.55 m, film: 0.6 m wide). Using the glass-type corrugated substrates, two PLECs based on (poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene]) and (super-yellow poly(p-phenylene vinylene)) (SY-PPV) are fabricated by solution-based spin-coating methods, which can in practice be replaced by roll-to-roll methods. The corrugated PLECs with SY-PPV show high brightness of 1740 cd cm(-2) and 2.1 times greater efficiency without changing the original spectrum or angular dependence. This successful combination of corrugated substrates and PLECs is one of the best examples of a promising cost-effective, high-performance lighting technology.
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