Passivating Crystal Boundaries with Potassium‐Rich Phase in Organic Halide Perovskite

Solar RRL ◽  
2019 ◽  
Vol 3 (5) ◽  
pp. 1900053 ◽  
Author(s):  
Liang Kuai ◽  
Yusheng Wang ◽  
Zixiang Zhang ◽  
Yingguo Yang ◽  
Yuanshuai Qin ◽  
...  
Keyword(s):  
Rich Phase ◽  
Organic Halide ◽  
Halide Perovskite ◽  
Crystal Boundaries

E-Synapse Based on Lead-Free Organic Halide Perovskite (CH3NH3)3Sb2Cl9 for Neuromorphic Computing

2021 ◽  
Vol 68 (9) ◽  
pp. 4425-4430
Author(s):  
Ziquan Ni ◽  
Yangbin Zhu ◽  
Songman Ju ◽  
Zhongwei Xu ◽  
Fengqing Tian ◽  
...  
Keyword(s):  
Lead Free ◽  
Neuromorphic Computing ◽  
Organic Halide ◽  
Halide Perovskite

Stabilization of Lead–Tin-Alloyed Inorganic–Organic Halide Perovskite Quantum Dots

ACS Nano ◽  
2018 ◽  
Vol 12 (12) ◽  
pp. 12129-12139 ◽  
Author(s):  
Aarti Mehta ◽  
Jino Im ◽  
Bo Hyung Kim ◽  
Hanul Min ◽  
Riming Nie ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Organic Halide ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite

scholarly journals Conversion of metal-organic halide perovskite from PbI2 precursor films grown by hot-wall method

2018 ◽  
Vol 192 ◽  
pp. 01031
Author(s):  
Satoru Seto ◽  
Rintaro Shimizu ◽  
Makoto Tokuda
Keyword(s):  
Solar Cells ◽  
Perovskite Phase ◽  
Perovskite Solar Cells ◽  
X Ray Diffraction ◽  
Organic Halide ◽  
Metal Organic ◽  
Halide Perovskite ◽  
Planar Heterojunction ◽  
Conversion Efficiencies ◽  
Wall Method

We report on metal-organic halide perovskite CH3NH3PbI3 films converted from PbI2 precursors for planar heterojunction perovskite solar cells. PbI2 films as a precursor were deposited by hot-wall method and conventional vacuum evaporation. The conversion to perovskite phase from the PbI2 films were performed by annealing in methyl ammonium iodine (MAI) vapour at 120-150 °C. We confirmed that no residual PbI2 phase can be detected in the converted perovskite films by x-ray diffraction measurements. The surface morphology of the perovskite films was measured by AFM. Roughness Ra of the films is 17.8 nm, which is comparable value to the reported ones. Using the converted perovskite films we fabricated tentative perovskite solar cells with a device architecture of ITO/PEDOT:PSS/Perovskite/C60/Ag. The power conversion efficiencies of the fabricated solar cells from a conventional evaporation and the hot-wall method exhibited 2.22 and 2.33%, respectively.

scholarly journals Improving Two-Step Prepared CH3NH3PbI3 Perovskite Solar Cells by Co-Doping Potassium Halide and Water in PbI2 Layer

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 666 ◽  
Author(s):  
Hsuan-Ta Wu ◽  
Yu-Ting Cheng ◽  
Ching-Chich Leu ◽  
Shih-Hsiung Wu ◽  
Chuan-Feng Shih
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Defect Density ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Organic Halide ◽  
Co Doping ◽  
Halide Perovskite ◽  
Potassium Halides

Incorporating additives into organic halide perovskite solar cells is the typical approach to improve power conversion efficiency. In this paper, a methyl-ammonium lead iodide (CH3NH3PbI3, MAPbI3) organic perovskite film was fabricated using a two-step sequential process on top of the poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) hole-transporting layer. Experimentally, water and potassium halides (KCl, KBr, and KI) were incorporated into the PbI2 precursor solution. With only 2 vol% water, the cell efficiency was effectively improved. Without water, the addition of all of the three potassium halides unanimously degraded the performance of the solar cells, although the crystallinity was improved. Co-doping with KI and water showed a pronounced improvement in crystallinity and the elimination of carrier traps, yielding a power conversion efficiency (PCE) of 13.9%, which was approximately 60% higher than the pristine reference cell. The effect of metal halide and water co-doping in the PbI2 layer on the performance of organic perovskite solar cells was studied. Raman and Fourier transform infrared spectroscopies indicated that a PbI2-dimethylformamide-water related adduct was formed upon co-doping. Photoluminescence enhancement was observed due to the co-doping of KI and water, indicating the defect density was reduced. Finally, the co-doping process was recommended for developing high-performance organic halide perovskite solar cells.

Temperature-dependent band structure evolution determined by surface geometry in organic halide perovskite single crystals

2020 ◽  
Vol 102 (24) ◽  
Author(s):  
Jinpeng Yang ◽  
Matthias Meissner ◽  
Takuma Yamaguchi ◽  
Bin Xi ◽  
Keishi Takahashi ◽  
...  
Keyword(s):  
Band Structure ◽  
Single Crystals ◽  
Structure Evolution ◽  
Surface Geometry ◽  
Temperature Dependent ◽  
Organic Halide ◽  
Halide Perovskite

Solvent vapour annealing of methylammonium lead halide perovskite: what's the catch?

2020 ◽  
Vol 8 (21) ◽  
pp. 10943-10956 ◽  
Author(s):  
Onkar S. Game ◽  
Joel A. Smith ◽  
Tarek I. Alanazi ◽  
Michael Wong-Stringer ◽  
Vikas Kumar ◽  
...  
Keyword(s):  
Precursor Solution ◽  
Photovoltaic Device ◽  
Organic Halide ◽  
Solvent Vapour ◽  
Device Stability ◽  
Hybrid Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Solvent vapour annealing of hybrid perovskite films leads to stoichiometric changes, which adversely affect the photovoltaic device stability. This can be partially mitigated by incorporation of excess organic halide into the precursor solution.

Sign in / Sign up

Export Citation Format

Share Document