One-step dual-additive passivated wide-bandgap perovskites to realize 44.72%-efficient indoor photovoltaics

Abstract

The reduction of bulk trap defects in bromine-rich wide-bandgap (WBG) perovskites is crucial to enhance open-circuit voltage (Voc) and fill factor (FF) towards high-performance indoor photovoltaics (IPVs). Here, we report...

Ligand Homogenized Br–I Wide-Bandgap Perovskites for Efficient NiOx-Based Inverted Semitransparent and Tandem Solar Cells

“…The film deposition methods and solar cell fabrication processes are similar to those of our previous works. , Briefly, ITO glass substrates were first cleaned in sequence with sonication in detergent, deionized water, and IPA each for 10 min and then dried with N 2 flow. The ITO substrates were further treated by UV-ozone for 10 min.…”

“…With the breakthrough and rapid evolution of emerging organic–inorganic hybrid perovskite compositions, wide-bandgap (WBG) perovskites have shown a promising potential for indoor photovoltaics (IPVs) − and tandem solar cells. − Semitransparent solar cells (ST-SCs) are significant in achieving high-performance tandem solar cells and designing smart windows or out/indoor dual application-based building integrated photovoltaics (BIPVs). − WBG-perovskite-based ST-SCs meet the above requirements due to their feasibly tunable bandgap and their ability to harvest high-energy photons and filter harmful ultraviolet (UV) radiation. − For example, perovskite-Si and all-perovskite tandem SCs based on WBG-perovskite ST-SCs as a top subcell have been studied extensively and certified record power conversion efficiencies (PCEs) of 33.9% and 29.1%, respectively. , It should be noted that the PCEs in tandem SCs are mainly attributed to the top WBG-perovskite ST subcells that have a much higher open-circuit voltage ( V oc ) in comparison to that of the bottom narrow-bandgap SCs. Thus, it is significant to obtain a high V oc in WBG-perovskite ST-SCs, but unfortunately, the V oc has not been improved with the increase in bandgap, as expected.…”

Nuclei engineering for even halide distribution in stable perovskite/silicon tandem solar cells

“…We achieved this goal by simply adding oleylammonium iodide (OAmI) in the precursor, which is inspired by nanocrystal synthesis ( 29 , 30 ). Although the use of this additive has been previously reported ( 31 , 32 ), its function to engineer perovskite nuclei has not been fully exploited. We noted that other long-chain alkylamine ligands can perform the same function, as will be discussed below.…”

Enhancement of Efficiency of Perovskite Solar Cells with Hole-Selective Layers of Rationally Designed Thiazolo[5,4-d]thiazole Derivatives

“…Perovskite solar cells (PSCs), valued for their high power conversion efficiency (PCE), solution processability, and finely adjustable energy levels, have recently attracted considerable attention. − Their versatility is apparent in a variety of applications, from PSCs functioning optimally under one-sun illumination to indoor PSC (iPSCs) capable of harnessing energy from artificial lighting. − However, PSCs have yet to play an important role in the photovoltaic market, primarily due to certain limitations related to their relatively low stability in comparison to mature Si–PV devices. In order to improve the performance and stability of PSCs, numerous researchers have focused on interfacial engineering between carrier transport layers (CTLs) and perovskite layers. − Charge-selective materials and interfacial layers (IFLs) play crucial roles in the performance of PSCs.…”

“… 1 − 4 Their versatility is apparent in a variety of applications, from PSCs functioning optimally under one-sun illumination to indoor PSC (iPSCs) capable of harnessing energy from artificial lighting. 5 − 8 However, PSCs have yet to play an important role in the photovoltaic market, primarily due to certain limitations related to their relatively low stability in comparison to mature Si–PV devices. In order to improve the performance and stability of PSCs, numerous researchers have focused on interfacial engineering between carrier transport layers (CTLs) and perovskite layers.…”