Open AccessOptical property of organic quantum well structures
Author(s) -
Song Shu-Fang,
Zhao De-Wei,
Xu Zheng,
Xurong Xu
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.2910
Subject(s) - cyclic voltammetry , photoluminescence , materials science , absorption (acoustics) , layer (electronics) , quantum well , absorption spectroscopy , deposition (geology) , optoelectronics , analytical chemistry (journal) , optics , nanotechnology , chemistry , physics , electrode , electrochemistry , laser , biology , paleontology , composite material , chromatography , sediment
Single layer Alq3, double layer PBD/Alq3 and quantum well PBD/Alq3/PBD structures have been grown by organic molecular beam deposition. Energy levels and optical property of these samples are determined by cyclic voltammetry, optical absorption and photoluminescence (PL). Cyclic voltammetry and optical absorption results indicate that PBD/Alq3/PBD structures can be classified as type I quantum well. The PL experimental results indicate that PL peak, of single layer Alq3 structures do not shift to higher energy with decreasing layer thickness. However, for double layer PBD/Alq3 and quantum well PBD/Alq3/PBD structures, PL peaks shift to higher energy with decreasing layer thickness. The reason for blue shift of PL in organic quantum well structures is discussed in light of the theoretical and experimental results published in the literature.