Chengbin Fei
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View article: Recycling Silicon Bottom Cells from End-of-Life Perovskite–Silicon Tandem Solar Cells
Recycling Silicon Bottom Cells from End-of-Life Perovskite–Silicon Tandem Solar Cells Open
Perovskite–silicon tandem cells have shown much higher efficiencies than single-junction cells, which promises further reduction of energy cost from photovoltaics. Due to the protection by perovskites, silicon subcells in perovskite–silico…
View article: Strong-bonding hole-transport layers reduce ultraviolet degradation of perovskite solar cells
Strong-bonding hole-transport layers reduce ultraviolet degradation of perovskite solar cells Open
The light-emitting diodes (LEDs) used in indoor testing of perovskite solar cells do not expose them to the levels of ultraviolet (UV) radiation that they would receive in actual outdoor use. We report degradation mechanisms of p-i-n-struc…
View article: Screening Metal Halide Perovskite Solar Modules for Premature Field Failures
Screening Metal Halide Perovskite Solar Modules for Premature Field Failures Open
Developing metal halide perovskite (MHP) photovoltaic (PV) devices into reliable large-area solar modules could accelerate global solar energy deployment. Many MHP devices are susceptible to degradation under light and elevated temperature…
View article: Field‐Relevant Degradation Mechanisms in Metal Halide Perovskite Modules
Field‐Relevant Degradation Mechanisms in Metal Halide Perovskite Modules Open
Field testing, failure analysis, and understanding of degradation mechanisms are essential to advancing metal halide perovskite (MHP) photovoltaic (PV) technology toward commercialization. Here, we present performance data from up to 1 yea…
View article: Strong-bonding hole-transport layers reduce ultraviolet degradation of perovskite solar cells
Strong-bonding hole-transport layers reduce ultraviolet degradation of perovskite solar cells Open
The light-emitting diodes (LEDs) used in indoor testing of perovskite solar cells do not expose them to the levels of ultraviolet (UV) radiation that they would receive in actual outdoor use. We report degradation mechanisms of p-i-n–struc…
View article: Shunt mitigation toward efficient large-area perovskite-silicon tandem solar cells
Shunt mitigation toward efficient large-area perovskite-silicon tandem solar cells Open
The efficiency of small-area perovskite-silicon tandem solar cells is already above 30%; however, there are few studies about large-area tandem cells. One main challenge for the upscaling of perovskite-silicon tandems is the non-uniformity…
View article: Daily Performance Changes in Metal Halide Perovskite PV Modules
Daily Performance Changes in Metal Halide Perovskite PV Modules Open
Metal halide perovskite photovoltaic modules deployed outdoors and held at their maximum power point show daily, reversible, relative changes of up to 30% in efficiency between morning and afternoon. Predicting energy yield and quantifying…
View article: Lead-chelating hole-transport layers for efficient and stable perovskite minimodules
Lead-chelating hole-transport layers for efficient and stable perovskite minimodules Open
The defective bottom interfaces of perovskites and hole-transport layers (HTLs) limit the performance of p-i-n structure perovskite solar cells. We report that the addition of lead chelation molecules into HTLs can strongly interact with l…
View article: Recycling Silicon Bottom Cells from End-of-Life Perovskite–Silicon Tandem Solar Cells
Recycling Silicon Bottom Cells from End-of-Life Perovskite–Silicon Tandem Solar Cells Open
Perovskite-silicon tandem cells have shown much higher efficiencies than the single junction cells, which promises further reduction of energy cost from photovoltaics. Due to the protection by perovskites, silicon subcells in perovskite-si…
View article: Perovskite grain wrapping by converting interfaces and grain boundaries into robust and water-insoluble low-dimensional perovskites
Perovskite grain wrapping by converting interfaces and grain boundaries into robust and water-insoluble low-dimensional perovskites Open
Stabilizing perovskite solar cells requires consideration of all defective sites in the devices. Substantial efforts have been devoted to interfaces, while stabilization of grain boundaries received less attention. Here, we report on a mol…
View article: Influence of voids on the thermal and light stability of perovskite solar cells
Influence of voids on the thermal and light stability of perovskite solar cells Open
The formation of voids in perovskite films close to the buried interface has been reported during film deposition. These voids are thought to limits the efficiency and stability of perovskite solar cells (PSCs). Here, we studied the voids …
View article: High grain boundary recombination velocity in polycrystalline metal halide perovskites
High grain boundary recombination velocity in polycrystalline metal halide perovskites Open
Understanding carrier recombination processes in metal halide perovskites is fundamentally important to further improving the efficiency of perovskite solar cells, yet the accurate recombination velocity at grain boundaries (GBs) has not b…
View article: Pathways to High Efficiency Perovskite Monolithic Solar Modules
Pathways to High Efficiency Perovskite Monolithic Solar Modules Open
With the rapidly improving efficiency and stability of perovskite solar cells, the transition of small area device fabrication innovations into modules is becoming increasingly important for the commercialization of this technology. The re…
View article: Lead-adsorbing ionogel-based encapsulation for impact-resistant, stable, and lead-safe perovskite modules
Lead-adsorbing ionogel-based encapsulation for impact-resistant, stable, and lead-safe perovskite modules Open
We report a lead-adsorbing ionogel to enhance perovskite module mechanical strength and stability and reduce lead leakage.
View article: Ultrafast Carrier Dynamics of Dual Emissions from the Orthorhombic Phase in Methylammonium Lead Iodide Perovskites Revealed by Two-Dimensional Coherent Spectroscopy
Ultrafast Carrier Dynamics of Dual Emissions from the Orthorhombic Phase in Methylammonium Lead Iodide Perovskites Revealed by Two-Dimensional Coherent Spectroscopy Open
The fundamental understanding of photoexcitation landscape and dynamics in hybrid organic-inorganic perovskites is essential for improving their performance in solar cells and other applications. The dual emission features from the orthorh…
View article: Constructing water-resistant CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>perovskite films via coordination interaction
Constructing water-resistant CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>perovskite films via coordination interaction Open
2-aminoethanethiol in perovskite films improves the intrinsic water-resistance, and the films can retain the MAPbI3perovskite crystal structure when immersed in water for a long time (>10 minutes).