scholarly journals Electron/hole blocking layers as ionic blocking layers in perovskite solar cells

2021 ◽  
Vol 9 (6) ◽  
pp. 1888-1894
Author(s):  
Sapir Bitton ◽  
Nir Tessler
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Ion Diffusion ◽  
Electron Hole ◽  
Internal Parameters

Ion diffusion into the BLs changes the device from symmetric-intrinsic to asymmetric-doped with all internal parameters changed.

scholarly journals Direct Observation of Long Electron-Hole Diffusion Distance in CH3NH3PbI3 Perovskite Thin Film

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Yu Li ◽  
Weibo Yan ◽  
Yunlong Li ◽  
Shufeng Wang ◽  
Wei Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Acid Methyl Ester ◽  
Diffusion Distance ◽  
Transfer Layer ◽  
Electron Hole ◽  
Direct Support ◽  
Short Diffusion Distance

Abstract In high performance perovskite based solar cells, CH3NH3PbI3 is the key material. We carried out a study on charge diffusion in spin-coated CH3NH3PbI3 perovskite thin film by transient fluorescent spectroscopy. A thickness-dependent fluorescent lifetime was found. By coating the film with an electron or hole transfer layer, [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) or 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD) respectively, we observed the charge transfer directly through the fluorescence quenching. One-dimensional diffusion model was applied to obtain long charge diffusion distances in thick films, which is ~1.7 μm for electrons and up to ~6.3 μm for holes. Short diffusion distance of few hundreds of nanometer was also observed in thin film. This thickness dependent charge diffusion explained the formerly reported short charge diffusion distance (~100 nm) in films and resolved its confliction to thick working layer (300–500 nm) in real devices. This study presents direct support to the high performance perovskite solar cells and will benefit the devices’ design.

Toward charge extraction in all-inorganic perovskite solar cells by interfacial engineering

2018 ◽  
Vol 6 (44) ◽  
pp. 21999-22004 ◽  
Author(s):  
Jie Ding ◽  
Jialong Duan ◽  
Chenyang Guo ◽  
Qunwei Tang
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Electron Hole ◽  
Inorganic Perovskite ◽  
Interfacial Engineering ◽  
Charge Extraction ◽  
Hole Recombination

CuInS2/ZnS QDs with tunable bandgaps were applied at the CsPbBr3/carbon interface for improved hole extraction and reduced electron–hole recombination. A PCE of as high as 8.42% was achieved for QDs tailored all-inorganic PSC in comparison with 6.01% for the pristine device.

Inverted perovskite solar cells with inserted cross-linked electron-blocking interlayers for performance enhancement

2015 ◽  
Vol 3 (17) ◽  
pp. 9291-9297 ◽  
Author(s):  
Hong-Jyun Jhuo ◽  
Po-Nan Yeh ◽  
Sih-Hao Liao ◽  
Yi-Lun Li ◽  
Sunil Sharma ◽  
...  
Keyword(s):  
Solar Cells ◽  
Performance Enhancement ◽  
Perovskite Solar Cells ◽  
Type Solution ◽  
Electron Hole ◽  
Solvent Resistance ◽  
Solution Processed ◽  
Hole Recombination

Cross-linked anode interlayers (X-QUPD or X-OTPD) with solvent-resistance provide electron blocking to reduce electron–hole recombination for improving PCE of invert type solution processed perovskite solar cells.

scholarly journals Research Update: Relativistic origin of slow electron-hole recombination in hybrid halide perovskite solar cells

APL Materials ◽  
2016 ◽  
Vol 4 (9) ◽  
pp. 091501 ◽  
Author(s):  
Pooya Azarhoosh ◽  
Scott McKechnie ◽  
Jarvist M. Frost ◽  
Aron Walsh ◽  
Mark van Schilfgaarde
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Slow Electron ◽  
Electron Hole ◽  
Halide Perovskite ◽  
Hole Recombination

Synergic effects of upconversion nanoparticles NaYbF4:Ho3+ and ZrO2 enhanced the efficiency in hole-conductor-free perovskite solar cells

Nanoscale ◽  
2018 ◽  
Vol 10 (46) ◽  
pp. 22003-22011 ◽  
Author(s):  
Yanyan Li ◽  
Li Zhao ◽  
Meng Xiao ◽  
Yimin Huang ◽  
Binghai Dong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Visible Light ◽  
Recombination Rate ◽  
Perovskite Solar Cells ◽  
Upconversion Nanoparticles ◽  
Electron Hole ◽  
Dual Functional ◽  
Nir Light ◽  
Hole Recombination

This design enabled the dual-functional effects, that is, the harvesting of NIR light and its conversion to visible light and the reduction of the electron–hole recombination rate.

UNDERSTANDING THE EFFECT OF DEPRESSOR ON THE TIO2 COMPACT LAYER FOR THE PHOTOCURRENT PERFORMANCE OF PEROVSKITE SOLAR CELLS

2018 ◽  
Vol 25 (07) ◽  
pp. 1950019
Author(s):  
CHENCHEN JIA ◽  
MIN CHE ◽  
LEI ZHU
Keyword(s):  
Solar Cells ◽  
Sol Gel ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
X Ray Diffraction ◽  
Electron Hole ◽  
Visible Absorption ◽  
Uv Visible ◽  
Short Current Density

The main purpose of a compact TiO2 film as a vital part of the electron transport layer in perovskite solar cells (PSCs) is to minimize electron–hole recombination on the surface of F-doped SnO2 (FTO) and enhance the photoelectric property. By controlling concentrations and using different depressors, an excellent compact TiO2 film is prepared by sol–gel method. This research utilized four depressors (nitric acid, acetic acid, diethanolamine and acetylacetone) and their volume ratios to ethanol are 0, 1:1 and 1:2 to synthesize the TiO2 precursor sol. The surface morphology, ingredient and microstructure as well as the optical and electrochemical properties of PSC devices based on them are investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV–visible absorption spectroscopy (UV–Vis), respectively. It is found that the device exhibited the most outstanding power conversion efficiency (PCE) of 14.92% via using diethanolamine as the depressor diluted in absolute ethanol in a proportion of 1:1 by volume. Further study showed that the enhanced PCE could be mainly ascribed to the increase of short-current density ([Formula: see text].

Interface engineering of perovskite solar cells with PEO for improved performance

2015 ◽  
Vol 3 (18) ◽  
pp. 9999-10004 ◽  
Author(s):  
H. P. Dong ◽  
Y. Li ◽  
S. F. Wang ◽  
W. Z. Li ◽  
N. Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Collection Efficiency ◽  
Perovskite Solar Cells ◽  
Device Performance ◽  
Interface Engineering ◽  
Electron Hole ◽  
Electron Collection ◽  
Improved Performance ◽  
Hole Recombination ◽  
Electron Collection Efficiency

A thin PEO layer was spin-coated on top of TiOx to modify the ETL for improved electron collection efficiency and better retarded electron–hole recombination, and therefore enhance device performance.

Synergetic effects of electrochemical oxidation of Spiro-OMeTAD and Li+ ion migration for improving the performance of n–i–p type perovskite solar cells

2021 ◽  
Author(s):  
Changzeng Ding ◽  
Rong Huang ◽  
Christian Ahläng ◽  
Jian Lin ◽  
Lianping Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electrochemical Oxidation ◽  
Perovskite Solar Cells ◽  
Charge Injection ◽  
Device Performance ◽  
Ion Diffusion ◽  
Ion Migration ◽  
Synergetic Effects ◽  
Li Ion ◽  
P Type

Oxidation of solar cells leads to Li+ ion diffusion, which increases the conductivity of the Spiro-OMeTAD layer and the built-in potential within the cells. The synergetic effects improve charge injection at both interfaces and device performance.

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