title: An Easy Approach to Control β-Phase Formation in PFO Films for Optimized Emission Properties.
abstract: We demonstrate a novel approach to control β-phase content generated in poly(9,9-dioctylfluorene) (PFO) films. A very small amount of paraffin oil was used as the additive to the PFO solution in toluene. The β-phase fraction in the spin-coated PFO films can be modified from 0% to 20% simply by changing the volume percentage of paraffin oil in the mixed solution. Organic light emitting diodes (OLEDs) and amplified spontaneous emission (ASE) study confirmed low β-phase fraction promise better OLEDs device, while high β-phase fraction benefits ASE performance.
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu-Singapore Joint Research Center for Organic/Bio Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. zq890531@163.com.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu-Singapore Joint Research Center for Organic/Bio Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. chilang_888@163.com.
authors.forename: Lang
authors.initials: L
authors.lastname: Chi
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu-Singapore Joint Research Center for Organic/Bio Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. haigang686@163.com.
authors.forename: Gang
authors.initials: G
authors.lastname: Hai
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu-Singapore Joint Research Center for Organic/Bio Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. fangyuetingfly@163.com.
authors.forename: Yueting
authors.initials: Y
authors.lastname: Fang
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu-Singapore Joint Research Center for Organic/Bio Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. iamxcli@163.com.
authors.forename: Xiangchun
authors.initials: X
authors.lastname: Li
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu-Singapore Joint Research Center for Organic/Bio Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. iamrdxia@njupt.edu.cn.
authors.forename: Ruidong
authors.initials: R
authors.lastname: Xia
authors.affiliation: Jiangsu-Singapore Joint Research Center for Organic/Bio-Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China. iamwhuang@njtech.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.affiliation: Institute of Photonics, University of Strathelyde, 106 Rottenrow, Glasgow, G4 0NW, UK. erdan.gu@strath.ac.uk.
authors.forename: Erdan
authors.initials: E
authors.lastname: Gu
mesh_terms: D005449:Fluorenes / Q000737:chemistry*; D008956:Models, Chemical; D011108:Polymers / Q000737:chemistry*
chemical_list: D005449:Fluorenes; D011108:Polymers
keywords: amplified spontaneous emission; organic light emitting diode; poly(9,9-dioctylfluorene); polymer optoelectronics; β-phase