Molecule‐Doped Nickel Oxide: Verified Charge Transfer and Planar Inverted Mixed Cation Perovskite Solar Cell

Advanced Materials, Journal Year: 2018, Volume and Issue: 30(20)

Published: March 30, 2018

Both conductivity and mobility are essential to charge transfer by carrier transport layers (CTLs) in perovskite solar cells (PSCs). The defects derived from generally used ionic doping method lead the degradation of parasite recombinations. In this work, a novel molecular NiOx hole layer (HTL) is realized successfully 2,2'-(perfluoronaphthalene-2,6-diylidene)dimalononitrile (F6TCNNQ). Determined X-ray photoelectron spectroscopy ultraviolet spectroscopy, Fermi level (EF ) HTLs increased -4.63 -5.07 eV valence band maximum (VBM)-EF declines 0.58 0.29 after F6TCNNQ doping. energy offset between VBMs perovskites 0.18 0.04 eV. Combining with first-principle calculations, electrostatic force microscopy applied for first time verify direct electron F6TCNNQ. average power conversion efficiency CsFAMA mixed cation PSCs boosted ≈8% depending on F6TCNNQ-doped HTLs. Strikingly, champion cell cations MAPbI3 -based devices gets 20.86% 19.75%, respectively. Different passivation effect, results offer an extremely promising inorganic CTLs PSCs. This methodology definitely paves way modulate hybrid electronics more than organic cells.

Language: Английский

---

Capturing the Sun: A Review of the Challenges and Perspectives of Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2017, Volume and Issue: 7(16)

Published: June 28, 2017

Hybrid metal halide perovskites have become one of the hottest topics in optoelectronic materials research recent years. Not only they surpassed everyone's expectations and achieved similar performance as tried true polycrystalline silicon photovoltaic devices, but are also finding applications a variety different fields, including lighting. The main advantages hybrid simple processability, compatible with large‐scale solution processing such roll‐to‐roll printing, abundance ingredients, all coupled to properties reminiscent GaAs. On road this remarkable success, series challenges been overcome, while some still remain. In review, these possible solutions described. particular, understanding perovskite crystallization process how knowledge can be harnessed enable better performing overcome reproducibility issues mitigate hysteresis, long‐term prospects technology terms stability sustainability will discussed.

Language: Английский

---

Performance-limiting nanoscale trap clusters at grain junctions in halide perovskites

Nature, Journal Year: 2020, Volume and Issue: 580(7803), P. 360 - 366

Published: April 15, 2020

Language: Английский

---

Highly Efficient Perovskite–Perovskite Tandem Solar Cells Reaching 80% of the Theoretical Limit in Photovoltage

Advanced Materials, Journal Year: 2017, Volume and Issue: 29(34)

Published: July 10, 2017

Organic-inorganic hybrid perovskite multijunction solar cells have immense potential to realize power conversion efficiencies (PCEs) beyond the Shockley-Queisser limit of single-junction cells; however, they are limited by large nonideal photovoltage loss (V oc,loss ) in small- and large-bandgap subcells. Here, an integrated approach is utilized improve V oc subcells with optimized bandgaps fabricate perovskite-perovskite tandem small . A fullerene variant, Indene-C60 bis-adduct, used achieve interfacial contact a small-bandgap (≈1.2 eV) subcell, which facilitates higher quasi-Fermi level splitting, reduces nonradiative recombination, alleviates hysteresis instabilities, improves 0.84 V. Compositional engineering (≈1.8 employed subcell transparent top electrode photostabilized 1.22 The resultant monolithic cell shows high 1.98 (approaching 80% theoretical limit) stabilized PCE 18.5%. significantly minimized better than state-of-the-art silicon-perovskite cells, highlights prospects using tandems for solar-energy generation. It also unlocks opportunities water splitting perovskites solar-to-hydrogen 15%.

Language: Английский

---

Experimental and SCAPS simulated formamidinium perovskite solar cells: A comparison of device performance

Solar Energy, Journal Year: 2020, Volume and Issue: 205, P. 349 - 357

Published: May 30, 2020

Language: Английский

---