Browse Items (10 total)

  • Collection: Perovskites

Evidence of tunable macroscopic polarization in perovskite films using photo-Kelvin Probe Force Microscopy

Using photo-Kelvin Probe Force Microscopy (photo-KPFM) we observed macroscopic, photo-induced polarization through 200 nm thick polycrystalline methylammonium lead triiodide (MAPbI(3)) perovskite films in MAPbI(3)/charge carrier transport material…

Role of Ionic Functional Groups on Ion Transport at Perovskite Interfaces

Hybrid organic/inorganic perovskite solar cells are invigorating the photovoltaic community due to their remarkable properties and efficiency. However, many perovskite solar cells show an undesirable current–voltage (I–V) hysteresis in their forward…

Aqueous-Processed Perovskite Solar Cells Based on Reactive Inkjet Printing

We report a one-step method for aqueous-processed perovskite active layer via reactive inkjet printing (RIJ) technique. The perovskite was successfully applied to fabricate solar cell
devices. This is to the best of our knowledge, the first time…

EFFECT OF PROCESSING PARAMETERS ON BI-SR-CA-CU-O SYSTEM

The effect of calcium content on the formation of the superconducting phases in the Bi-Sr-Ca-Cu-O systems has been examined. The influence of sintering temperature and the duration of sintering time has been studied.

Kinetics of Ion Transport in Perovskite Active Layers and Its Implications for Active Layer Stability

Solar cells fabricated using alkyl ammonium metal halides as light absorbers have the right combination of high power conversion efficiency and ease of fabrication to realize inexpensive but efficient thin film solar cells. However, they degrade…

Understanding Interface Engineering for High-Performance Fullerene/Perovskite Planar Heterojunction Solar Cells

Interface engineering is critical for achieving efficient solar cells, yet a comprehensive understanding of the interface between a metal electrode and electron transport layer (ETL) is lacking. Here, a significant power conversion efficiency (PCE)…

Rapid combinatorial screening of inkjet-printed alkyl-ammonium cations in perovskite solar cells

Herein we demonstrate that efficient perovskite solar cells can be fabricated by a desktop multi-channel inkjet printer. In this approach, different alkyl-ammonium counterions were loaded separately into the printer cartridges and deposited onto PbI2…

High Efficiency Tandem Thin-Perovskite/Polymer Solar Cells with a Graded Recombination Layer

Perovskite-containing tandem solar cells are attracting attention for their potential to achieve high efficiencies. We demonstrate a series connection of a similar to 90 nm thick perovskite front subcell and similar to 100 nm thick polymer:fullerene…

Evidence for reduced charge recombination in carbon nanotube/perovskite-based active layers

Using impedance spectroscopy and computation, we show that incorporation of multi-walled carbon nanotubes (MWCNTs) in the bulk of the active layer of perovskite-based solar cells reduces charge recombination and increases the open circuit voltage. An…