Organic solar cells (OSCs) based on chloroaluminum phthalocyanine (ClAlPc) as donor and fullerene C 60 as acceptor with a multi-tandem structure were fabricated. We demonstrated very high open-circuit voltage (V OC) and enhanced power conversion efficiency (PCE) for the multi-tandem OSCs. Using a fivefold structure, we obtained PCE of 2.49% with a V OC of 3.50 V, in comparison with PCE of ∼2 and V OC of 0.72-0.81 V for the single device. We also fabricated a tenfold-stacked OSC showing an extremely high V OC of 5.89 V. The multi-tandem OSCs with very high V OC have great potential for applications in limited-area low-power electronics.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)