Figure 6: Tandem devices structure and performance.
From: A polymer tandem solar cell with 10.6% power conversion efficiency
(a) Device structure of the tandem solar cell (Glass/ITO/ZnO/P3HT:ICBA/PEDOT:PSS/ZnO/PDTP-DFBT:PCBM/MoO3/Ag). (b) J–V curve of P3HT:ICBA/PDTP-DFBT:PC61BM combination (Tandem 1) and P3HT:ICBA/PDTP-DFBT:PC71BM combination (Tandem 2) under AM1.5G illumination from a calibrated solar simulator with an irradiation intensity of 100 mWcm2 (one Sun). (c) EQE of the tandem 1(black line) and 2 (red line) devices. A 700 and 550 nm light bias are used to get front and rear cell EQE, respectively. (d) The relationship of tandem cell FF and short circuit current (JSC) versus rear and front cell current ratio (JSC, rear/JSC,front).
