Effect of Terminal-Group Halogenation of Naphthalene-Based Nonfullerene Acceptors on Their Film Structure and Photophysical and Photovoltaic Properties

Author(s):  
Tomokazu Umeyama ◽  
Tatsuho Wada ◽  
Kensho Igarashi ◽  
Kosaku Kato ◽  
Akira Yamakata ◽  
...  



1981 ◽  
Vol 59 (4) ◽  
pp. 652-657 ◽  
Author(s):  
Cooper H. Langford ◽  
Bryan R. Hollebone ◽  
Daniel Nadezhdin

The photovoltaic properties of palladium tetraphenylporphyrin films on n-doped SnO2 transparent electrode in contact with a solution of quinone/hydroquinone are discussed as a function of the preparation of the film and history of its treatment with heat, H2, or O2/H2O. Magnetic circular dichroism (MCD) spectra of the electrodes provide guidance on film structure. There are three important results. First, MCD spectra show that photovoltaic behaviour is independent of crystallinity of the film. Second, the evolution of film behaviour as "doping" by O2/H2O occurs shows that photoprocesses occur at both the interface of the film with SnO2 and the electrolyte, leading to both photoanodic and photocathodic processes. Third, MCD spectra show that "doping" is not a surface or trace phenomenon but affects the axial ligand sensitive region of the spectra of molecules throughout the film. Transport of charge through the film by successive "redox" reactions appears to provide the simplest qualitative explanation of the results. That is, conduction is by hopping in a non-stoichiometrically oxidized film.



2005 ◽  
Vol 12 (1-2) ◽  
pp. 143-148 ◽  
Author(s):  
M. Ichiki ◽  
Y. Morikawa ◽  
Y. Mabune ◽  
T. Nakada ◽  
K. Nonaka ◽  
...  


Author(s):  
Matthew R. Libera ◽  
Martin Chen

Phase-change erasable optical storage is based on the ability to switch a micron-sized region of a thin film between the crystalline and amorphous states using a diffraction-limited laser as a heat source. A bit of information can be represented as an amorphous spot on a crystalline background, and the two states can be optically identified by their different reflectivities. In a typical multilayer thin-film structure the active (storage) layer is sandwiched between one or more dielectric layers. The dielectric layers provide physical containment and act as a heat sink. A viable phase-change medium must be able to quench to the glassy phase after melting, and this requires proper tailoring of the thermal properties of the multilayer film. The present research studies one particular multilayer structure and shows the effect of an additional aluminum layer on the glass-forming ability.



2008 ◽  
Author(s):  
Latika Menon ◽  
Eugen Panaitescu ◽  
Dattatri Nagesha ◽  
Trifon Fitchorov ◽  
John S. Morris ◽  
...  




2013 ◽  
Vol 28 (4) ◽  
pp. 436-440 ◽  
Author(s):  
Yi-Jun XIE ◽  
Yi-Ping GUO ◽  
Wen DONG ◽  
Bing GUO ◽  
Hua LI ◽  
...  


Author(s):  
N. V. Vishnyakov ◽  
◽  
N. M. Tolkach ◽  
P. S. Provotorov ◽  
◽  
...  


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