Raising the LUMO level of fullerene derivatives alleviates the output voltage loss in tin halide perovskite solar cells

Abstract

Two fullerene derivatives C60-MP and C60-ETPA, were designed and synthesized for tin-halide perovskite solar cells. The introducing of electron withdrawing group and alkyl chain reduced the electron affinity, thus endowed...

Stabilization of Perovskite Lattice and Suppression of Sn2+/Sn4+ Oxidation via Formamidine Acetate for High Efficiency Tin Perovskite Solar Cells

“…[25] Inverted TPSCs with a structure of ITO/PEDOT:PSS/ perovskite/C60-ETPA/BCP/Ag were fabricated to study the photovoltaic performance. [26] Figure 3a exhibited the characteristic current density-voltage (J-V) curve measured under AM 1.5G, and its detailed parameters were summarized in Table 1 and S3. The control device showed a low PCE (9.84%), opencircuit voltage (V oc ) (738 mV), short-circuit current density (J sc ) (19.63 mA cm −2 ), and filling factor (FF) (67.89%).…”

Non-toxic solvent-processed tin-halide perovskite solar cells via weak coordination

“…2d–f and Fig. S7,† the carrier-transport properties were investigated by photo-CELIV measurement with an electron-only structure of ITO/SnO 2 /FA 0.75 MA 0.25 SnI 2.75 Br 0.25 /C 60 -ETPA 44 /BCP/Ag. The electron mobility was calculated by the following equation:where A , t max , Δ j , d , and j 0 correspond to the extraction speed, the time of the maximum extraction current, the maximum extraction peak, the film thickness, and the displacement current.…”

“…2d-f and Fig. S7, † the carrier-transport properties were investigated by photo-CELIV measurement with an electron-only structure of ITO/SnO 2 /FA 0.75 MA 0.25 SnI 2.75 Br 0.25 /C 60 -ETPA 44 /BCP/Ag. The electron mobility was calculated by the following equation:…”

Pseudohalide-Modulated Crystallization for Efficient Quasi-2D Tin Perovskite Solar Cells with Minimized Voltage Deficit

“…Complete TPSCs devices were then fabricated with a c o n fi g u r a t i o n o f I T O / P E D O T : P S S / FA 0.75 MA 0.25 SnI 2.75 Br 0.25 :15%PEASCN/C60-ETPA/BCP/Ag (Figure 3a,b). 48 The representative current density−voltage (J−V) curves of TPSCs for the control and SCN are interpreted in Figure 3c, Table 1 and Table S1. The V oc value manifested a clear increase from 733 to 863 mV under the forward scan.…”