[10a-Z11-1~11] 12.5 Organic solar cells

[10a-Z11-7] Characterization of indoor photovoltaic cell under PWM lighting

〇Kazuya Tada¹ (1.Univ. of Hyogo)

Keywords:Organic thin-film photovoltaic cell, Indoor application, PWM lighting

Pulse width modulation (PWM) driving is common in solid-state or LED lighting. Unlike conventional lighting devices, the peak illumination intensity of a PWM-driven LED can be a hundredfold of average illumination intensity, causing strong lighting flicker. In this presentation, the impact of the flicker on indoor amorphous Si (a-Si) photovoltaic cell performance will be reported. The power conversion efficiency of an a-Si photovoltaic cell is found to be a function of not the average but the peak illumination intensity. Indoor photovoltaic can thus seriously underperform under PWM-driven solid-state lighting when the peak illumination intensity is high enough to decrement photovoltaic cell performance. Characteristics of an organic photovoltaic cell under PWM lighting will be also discussed in the presentation.