Cascade-energy-level alignment based organic photovoltaic cells by utilizing copper phthalocyanine as bipolar carrier transporting layer

2009 ◽  
Vol 94 (14) ◽  
pp. 143302 ◽  
Author(s):  
Guang Zhang ◽  
Wenlian Li ◽  
Bei Chu ◽  
Lili Chen ◽  
Fei Yan ◽  
...  
Keyword(s):  
Energy Level ◽  
Copper Phthalocyanine ◽  
Photovoltaic Cells ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells ◽  
Energy Level Alignment ◽  
Cascade Energy

Energy Level Alignment at Fullerene/Phthalocyanine Interface Studied by Electron Spectroscopies

2003 ◽  
Vol 771 ◽  
Author(s):  
Hisao Ishii ◽  
Atsushi Seko ◽  
Akira Kawakami ◽  
Kazunori Umishita ◽  
Yukio Ouchi ◽  
...  
Keyword(s):  
Energy Level ◽  
Photovoltaic Cells ◽  
Energy Shift ◽  
Metal Electrode ◽  
Organic Photovoltaic ◽  
Level Shift ◽  
Organic Photovoltaic Cells ◽  
Interface Formation ◽  
Band Bending ◽  
Energy Level Alignment

AbstractInterfacial band offset and band bending of organic semiconductors are critical to understand and improve organic photovoltaic cells. In this study, the energy level alignment of fullerene(C60) / metal-free phthalocyanine (H2Pc) interface which is one of the model interfaces of organic photovoltaic cells has been investigated using UV and X-ray photoemissions. For both ‘H2Pc on C60’ and “C60 on H2Pc' interfaces, 0.3 eV downward energy level shift was observed in XPS at the interface formation. This energy shift is quite steep in contrast to the band bending observed for C60/metal interfaces in our previous study, where thickness of 500nm was required to achieve 0.21eV band bending to get Fermi level alignment between metal electrode and C60. To clarify the origin of the band bending, the effect of the insertion of C60-H2Pc co-deposited layer between C60 and H2Pc layers was also investigated. The result suggested that possible doping of H2Pc to C60 is not main origin of the observed energy shift. We also found that the vacuum level shift at H2Pc/C60 interface is strongly dependent on the deposition sequence of the interface formation.

Tuning the Energy Level Offset between Donor and Acceptor with Ferroelectric Dipole Layers for Increased Efficiency in Bilayer Organic Photovoltaic Cells

2012 ◽  
Vol 24 (11) ◽  
pp. 1455-1460 ◽  
Author(s):  
Bin Yang ◽  
Yongbo Yuan ◽  
Pankaj Sharma ◽  
Shashi Poddar ◽  
Rafal Korlacki ◽  
...  
Keyword(s):  
Energy Level ◽  
Photovoltaic Cells ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells ◽  
Donor And Acceptor

Complementary Absorbing Star-Shaped Small Molecules for the Preparation of Ternary Cascade Energy Structures in Organic Photovoltaic Cells

2012 ◽  
Vol 23 (12) ◽  
pp. 1556-1565 ◽  
Author(s):  
Hyojung Cha ◽  
Dae Sung Chung ◽  
Suk Young Bae ◽  
Min-Jung Lee ◽  
Tae Kyu An ◽  
...  
Keyword(s):  
Small Molecules ◽  
Photovoltaic Cells ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells ◽  
Cascade Energy
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