NDLI: Performance of organic photovoltaic devices in the presence of buffer layers

Content Provider	Springer Nature Link
Author	Hong, Jin Woong Shin, Jong Yeol Kim, Seung Tae Choi, Hyun Min Kim, Gwi Yeol Kim, Tae Wan Kang, Yong Gil
Copyright Year	2014
Abstract	We have investigated the dependence of the efficiency improvement of organic photovoltaic devices on the buffer layer. A device with a three-layer structure of ITO/CuPc/C$_{60}$/BCP/Al was made as a reference through a thermal evaporation method. Characteristic parameters of the photovoltaic devices were measured and analyzed. The obtained open-circuit voltage V $_{ OC }$, short-circuit current density J $_{ SC }$, fill factor (FF), and energy-conversion efficiency (ECE) for the reference device were 0.25 V, 1.05 mA/cm$^{2}$, 0.45, and 0.12%, respectively. Also, devices with five-layer structures of ITO/PEDOT:PSS/CuPc/C$_{60}$/BCP/(LiF or Cs$_{2}$CO$_{3}$)/Al were fabricated, and their electrical characteristics were measured. The V $_{ OC }$, J $_{ SC }$, FF, and ECE for the device with the LiF buffer layer were 0.47 V, 3.31 mA/cm$^{2}$, 0.51, and 0.81%, and those obtained for the device with the Cs$_{2}$CO$_{3}$ buffer layer were 0.49 V, 3.52 mA/cm$^{2}$, 0.53, and 0.92%, respectively. The photovoltaic performance of the device with the Cs$_{2}$CO$_{3}$ layer was found to be better than those of the others. The V $_{ OC }$, J $_{ SC }$, FF, and ECE for the device with the Cs$_{2}$CO$_{3}$ layer were higher than those of the reference device by factors of 1.88, 3.35, 1.18, and 7.67, respectively.
Starting Page	303
Ending Page	307
Page Count	5
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	65
Issue Number	3
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2014-08-19
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cesium carbonate Buffer layer Photovoltaic device Energy-conversion efficiency Lithium fluoride Theoretical, Mathematical and Computational Physics Physics Particle and Nuclear Physics PEDOT:PSS
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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