The design of cathode for organic photovoltaic devices

De Song; Feng Shi; Xuan Xia; Ye Li; Qingduo Duanmu

doi:10.1117/12.2249740

7 November 2016 The design of cathode for organic photovoltaic devices

De Song, Feng Shi, Xuan Xia, Ye Li, Qingduo Duanmu

Proceedings Volume 10141, Selected Papers of the Chinese Society for Optical Engineering Conferences held July 2016; 101410X (2016) https://doi.org/10.1117/12.2249740
Event: Selected Proceedings of the Chinese Society for Optical Engineering Conferences held July 2016, 2016, Changchun, China

Abstract

We have discussed the effect of the residual gas in the Al metal cathode deposition process and consequently influence the performance of organic photovoltaic devices (such as organic photoelectron detector or solar cell). We believe that the origin of degradation in J_sc and FF from the Al cathode device should be the formation of AlO_x in the C₆₀-Al interface, which contaminate the interface and plays a role like an energy barrier that block the charge collect process. To solve this problem the Ag and Alq₃ layer had been inserted before the Al. Owing to the advantageous of Alq₃ and Ag layer, the device which Al cathode prepared at a lower vacuum condition exhibits a comparable performance to that device which Al cathode deposited in regular situation. As an additional benefit, since the introducing of Alq₃/Ag layer in the VOPc/C₆₀ organic photovoltaic device performs a better near-infrared response, this phenomenon has been confirmed by means of both simulation and experimental data. So the design of our new cathode structure provides a degree of freedom to modulate the light absorption for organic photovoltaic devices in short-wave and long-wave.

Citation Download Citation

De Song, Feng Shi, Xuan Xia, Ye Li, and Qingduo Duanmu "The design of cathode for organic photovoltaic devices", Proc. SPIE 10141, Selected Papers of the Chinese Society for Optical Engineering Conferences held July 2016, 101410X (7 November 2016); https://doi.org/10.1117/12.2249740

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KEYWORDS

Aluminum

Silver

Organic photovoltaics

External quantum efficiency

Metals

Roentgenium

Absorption

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