Energy Landscape of Vertically Anisotropic Polymer Blend Films toward Highly Efficient Polymer Light‐Emitting Diodes (PLEDs)

• Published in: Advanced functional materials Vol. 28; no. 8
• Main Authors: Hassan, Muhammad Umair, Liu, Yee‐Chen, Yetisen, Ali K., Butt, Haider, Friend, Richard Henry
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc 21.02.2018
• Subjects: anisotropic films; Charge transport; charge traps; Current carriers; energy band diagram; Energy distribution; Excitons; Hole mobility; Hole traps; Light emission; Light emitting diodes; Materials science; Molecular orbitals; Organic light emitting diodes; Polymer blends; Polymer films; Radiative recombination; Raman spectroscopy; Vertical distribution

A blend of two hole‐dominant polymers is created and used as the light emissive layer in light‐emitting diodes to achieve high luminous efficiency up to 22 cd A−1. The polymer blend F81−xSYx is based on poly(9,9‐dioctylfluorene) (F8) and poly(para‐phenylene vinylene) derivative superyellow (SY). The...