title: Simultaneously enhanced device efficiency, stabilized chromaticity of organic light emitting diodes with lambertian emission characteristic by random convex lenses.
abstract: An optical functional film applicable to various lighting devices is demonstrated in this study. The phase separation of two immiscible polymers in a common solvent was used to fabricate the film. In this paper, a self-organized lens-like structure is realized in this manner with optical OLED functional film. For an OLED, there are a few optical drawbacks, including light confinement or viewing angle distortion. By applying the optical film to an OLED, the angular spectra distortion resulting from the designed organic stack which produced the highest efficiency was successfully stabilized, simultaneously enhancing the efficiency of the OLED. We prove the effect of the film on the efficiency of OLEDs through an optical simulation. With the capability to overcome the main drawbacks of OLEDs, we contend that the proposed film can be applied to various lighting devices.
authors.affiliation: Soft I/O Interface Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea.|Display and Nanosystem Laboratory, College of Engineering, Korea University, Seoul 02842, Korea.
authors.forename: Keunsoo
authors.initials: K
authors.lastname: Lee
authors.affiliation: Soft I/O Interface Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea.
authors.forename: Jonghee
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141, Korea.
authors.forename: Eunhye
authors.initials: E
authors.lastname: Kim
authors.affiliation: Soft I/O Interface Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea.
authors.forename: Jeong-Ik
authors.initials: JI
authors.lastname: Lee
authors.affiliation: Soft I/O Interface Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea.
authors.forename: Doo-Hee
authors.initials: DH
authors.lastname: Cho
authors.affiliation: Soft I/O Interface Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea.
authors.forename: Jong Tae
authors.initials: JT
authors.lastname: Lim
authors.affiliation: Soft I/O Interface Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea.
authors.forename: Chul Woong
authors.initials: CW
authors.lastname: Joo
authors.affiliation: Soft I/O Interface Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea.
authors.forename: Joo Yeon
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141, Korea.
authors.forename: Seunghyup
authors.initials: S
authors.lastname: Yoo
authors.affiliation: Display and Nanosystem Laboratory, College of Engineering, Korea University, Seoul 02842, Korea.
authors.forename: Byeong-Kwon
authors.initials: BK
authors.lastname: Ju
authors.affiliation: Soft I/O Interface Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea.
authors.forename: Jaehyun
authors.initials: J
authors.lastname: Moon