Reduction Capacitance Effect in DSC under Indoor Low Level Lighting by Real-Time One-Sweep Method

Der-Gun Chou^a, Teng-Chun Wu^a, Shu-Tsung Hsu^a, Yean-San Long^a

^aitri, hsinchu, hsinchu, 300, Taiwan, Republic of China

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Der-Gun Chou, 008
Publication date: 5th February 2015

The advantages of DSC (dye sensitized cell) are low pollution, flexible and low-light performance. But the challenges for DSC manufactures still are lacking of accurately performance measurements due to capacitance effect.DSC requires the low level lighting on each very slow temporal response in the I-V curves, which are clearly dependent on the voltage sweep direction, even when the sweep time is not the same in different level lighting (Table 1 and Fig. 1). In addition, the temporal response is also decided on the level of lighting. In order to improve measurement accuracy, this work aims to propose a new I-V characterization method of DSC under low level lighting indoors. Results showed (a) the response time, which relies on lighting level and property of dye, is to decrease while increasing the level of lighting in the forward and to keep constant in the backward (Table 1). (b) Real-Time One-Sweep Method (RTOSM) is successful to reduce the capacitance effect for DSC (Table 2, [3]). Thisnew test method indetermining I-V performance of DSC also can work in different level lighting. Consequently, RTOSM can be applied to different electronic transport materials[1, 2], and slow down the measuringtime forDSCas well.Results also have been applied for SEMI PV57-1214[3] in 2014.Emerging device makers and buyers, or any other party interested, can thus have a common testing standard to refer to when desired.

[1] T. C. Wu, S. T. Hsu and Y. S. Long, “New Set-up Procedures and Integrated Measurement System for Organic Photovoltaic (OPV) Module�, International Photovoltaic Science and Engineering Conference, 2013. [2] Y. S. Long, S. T. Hsu and T. C. Wu, “Induction of Internal Capacitance Effect in Performance Measurement of OPV (Organic Photovoltaic) Device by RTOSM (Real-Time One-Sweep Method)�, Journal of Energy and Power Engineering, Vol 8, pp1059-1066, 2014. [3] SEMI PV57-1214, “Test Method for Current- Voltage (I-V) Performance Measurement of Organic Photovoltaic (OPV) and Dye-Sensitized Solar Cell (DSSC)�.

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