Abstract
Abstract Indoor photovoltaics (IPVs) are receiving great attention because they can power the wireless microelectronic devices needed for Internet of Things (IoTs) applications. Many polymer acceptors have been designed and synthesized for solar cell applications. In this manuscript, we study the application of three polymer acceptors in all-polymer indoor photovoltaic devices. The polymer acceptors containing boron-nitrogen coordination bond (B←N) have medium bandgap of 1.8–1.9 eV and proper the lowest unoccupied molecular orbital energy level (ELUMO) and the highest occupied molecular orbital energy level (EHOMO) alignment and consequently are very suitable for IPV application. Under fluorescent lamp illumination at the brightness of 2000 lux, the devices based on the polymer acceptors containing B←N unit show the open-circuit voltage of 1.08 V and a power conversion efficiency (PCE) of 23.2%. This performance is much higher than that of other imide-based polymer acceptors with small bandgap and wide absorption spectrum.
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