Organometallic-functionalized interfaces for highly efficient inverted perovskite solar cells

Abstract

Further enhancing the performance and stability of inverted perovskite solar cells (PSCs) is crucial for their commercialization. We report that the functionalization of multication and halide perovskite interfaces with an organometallic compound, ferrocenyl-bis-thiophene-2-carboxylate (FcTc 2 ), simultaneously enhanced the efficiency and stability of inverted PSCs. The resultant devices achieved a power conversion efficiency of 25.0% and maintained >98% of their initial efficiency after continuously operating at the maximum power point for 1500 hours under simulated AM1.5 illumination. Moreover, the FcTc 2 -functionalized devices passed the international standards for mature photovoltaics (IEC61215:2016) and have exhibited high stability under the damp heat test (85°C and 85% relative humidity).

Overcome Low Intrinsic Conductivity of NiOx Through Triazinyl Modification for Highly Efficient and Stable Inverted Perovskite Solar Cells

“…[1][2][3][4] At present, the state-of-the-art traditional (n-i-p) PSCs have a reached record PCE of 25.7%. [5] Inverted PSCs have made great breakthroughs, [6] but their PCE are still behind the traditional PSCs. The inverted PSCs display less hysteresis effect, better stability, and excellent compatibility with tandem cells.…”

Interface functionalization in inverted perovskite solar cells: From material perspective

“…Long and their colleagues have developed a novel organometallic compound, ferrocenyl-bis-thiophene-2-carboxylate (FcTc2), as an interface layer to enhance the efficiency and stability of inverted PSCs as shown in Fig. 2 [17]. The FcTc2 functionalized devices obtained a champion power conversion efficiency (PCE) of up to 25.0% (with certified 24.3%), which is the record efficiency for inverted PSCs.…”

Solar Energy in Space Applications: Review and Technology Perspectives

“…State-of-art PSCs are nowadays fabricated by using a 2D perovskite layer on top of a bulk (3D) perovskite absorber. [176] Such 3D/2D heterostructures strategy is not limited to PSCs, in fact an NREL team has recently demonstrated that this is a general concept that can be efficiently considered for several thin film PV such as CdTe and CIGS. [177] Figure 9.…”