TY - JOUR
T1 - Design Strategy for Robust Organic Semiconductor Laser Dyes
AU - Oyama, Yuya
AU - Mamada, Masashi
AU - Shukla, Atul
AU - Moore, Evan G.
AU - Lo, Shih Chun
AU - Namdas, Ebinazar B.
AU - Adachi, Chihaya
N1 - Funding Information:
We thank Dr. R. Kabe for helpful discussions, Ms. K. Kusuhara and Ms. N. Nakamura for material supply, and Dr. W. J. Potscavage, Jr., for thorough editing of the manuscript. This work was financially supported by JST ERATO grant number JPMJER1305 and JSPS KAKENHI grant number 19H02790 and the Australian Research Council (DP160100700).
Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/2/3
Y1 - 2020/2/3
N2 - A new molecular design for organic semiconductor laser dyes showing excellent optical properties and high robustness is disclosed in this work. The suitability of a furan moiety for increasing the thermal and photostability in newly developed furan-based derivatives (BPBFCz) is demonstrated by comparing a well-known laser molecule (BSBCz) having a bis-stilbene unit. The new derivatives exhibited high photoluminescence quantum yields of nearly 100% and radiative rate constants of ∼109 s-1 in both solution and doped films, and their properties were also excellent in neat films. The amplified spontaneous emission (ASE) thresholds of the BPBFCz materials were found to be very low (<1 μJ cm-2), and the excited-state absorption in the ASE oscillation region was negligible, which is preferable for laser applications. In addition to these excellent optical properties, which are comparable or superior to those of BSBCz, the decomposition temperatures of the BPBFCz emitters were much higher than that of BSBCz, resulting in the suppression of impurity formation during the thermal deposition. In addition, the photostability of the new materials was dramatically improved compared with that of BSBCz. This study serves as a very significant advancement toward the practical application of organic semiconductor laser diodes and provides molecular design guidelines for robust organic laser molecules.
AB - A new molecular design for organic semiconductor laser dyes showing excellent optical properties and high robustness is disclosed in this work. The suitability of a furan moiety for increasing the thermal and photostability in newly developed furan-based derivatives (BPBFCz) is demonstrated by comparing a well-known laser molecule (BSBCz) having a bis-stilbene unit. The new derivatives exhibited high photoluminescence quantum yields of nearly 100% and radiative rate constants of ∼109 s-1 in both solution and doped films, and their properties were also excellent in neat films. The amplified spontaneous emission (ASE) thresholds of the BPBFCz materials were found to be very low (<1 μJ cm-2), and the excited-state absorption in the ASE oscillation region was negligible, which is preferable for laser applications. In addition to these excellent optical properties, which are comparable or superior to those of BSBCz, the decomposition temperatures of the BPBFCz emitters were much higher than that of BSBCz, resulting in the suppression of impurity formation during the thermal deposition. In addition, the photostability of the new materials was dramatically improved compared with that of BSBCz. This study serves as a very significant advancement toward the practical application of organic semiconductor laser diodes and provides molecular design guidelines for robust organic laser molecules.
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U2 - 10.1021/acsmaterialslett.9b00536
DO - 10.1021/acsmaterialslett.9b00536
M3 - Article
AN - SCOPUS:85079827941
SN - 2639-4979
VL - 2
SP - 161
EP - 167
JO - ACS Materials Letters
JF - ACS Materials Letters
IS - 2
ER -