Discerning rise time constants to quantify charge carrier extraction in perovskite solar cells

Ravishankar, Sandheep; Kruppa, Lennard; Jenatsch, Sandra; Yan, Genghua; Wang, Yueming

doi:10.1039/d3ee02013d

Cited by 2 publications

(1 citation statement)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shorter TPC decay time in the PSC with 5% MWCNT indicates more efficient charge extraction and transfer. This observation aligns with the results obtained from TPV and TPC analyses, suggesting that enhanced charge extraction and transfer, along with the suppression of charge carrier recombination, contribute to improvements in the whole parameters in IV curve . These enhancements collectively enhance the photovoltaic performance of the PSC with 5% MWCNTs, as supported by various analyses in this study.…”

Section: Resultssupporting

confidence: 91%

Multiwalled Carbon Nanotubes as Hole Collectors in Inverted Perovskite Solar Cells

Elseman,

Al-Gamal

2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Carbon nanotubes (CNTs) are known for their unique photoelectric and mechanical properties, but their manufacturing process often requires high thermal energy. This study presents a simple solvothermal method to produce multiwalled carbon nanotubes (MWCNTs) from acetyl ferrocene at a low temperature of 250 °C. The synthesized MWCNTs were fully characterized and elucidated through X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy. The MWCNTs were then incorporated into poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PE-DOT:PSS) at different weight ratios (2.5, 5, and 10%) as a hole transporter in perovskite solar cells. The results of UV−vis spectroscopy showed that MWCNTs/ PEDOT:PSS did not affect the photon transmission to the perovskite layer. Photoluminescent analysis for PEDOT:PSS and optimal MWCNTs significantly reduced light emission by 93.3% for 5% MWCNTs in PEDOT:PSS. The device with the optimized 5% MWCNTs/PEDOT:PSS hole collector achieved an efficiency of 18.09%, compared to 16.51% for pristine PEDOT:PSS. This work demonstrates a promising approach for enhancing the efficiency of inverted planar perovskite-based devices through the use of MWCNTs prepared at low temperatures using a simple solution process.

show abstract

Section: Resultssupporting

confidence: 91%

Multiwalled Carbon Nanotubes as Hole Collectors in Inverted Perovskite Solar Cells

Elseman,

Al-Gamal

2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

Hysteresis, Impedance, and Transients Effects in Halide Perovskite Solar Cells and Memory Devices Analysis by Neuron‐Style Models

Bisquert

2024

Advanced Energy Materials

View full text Add to dashboard Cite

Halide perovskites are at the forefront of active research in many applications, such as high performance solar cells, photodetectors, and synapses and neurons for neuromorphic computation. As a result of ion transport and ionic‐electronic interactions, current and recombination are influenced by delay and memory effects that cause hysteresis of current–voltage curves and long switching times. A methodology to formulate device models is shown, in which the conduction and recombination electronic variables are influenced by internal state variables. The models are inspired in biological frameworks of the Hodgkin–Huxley class of models. Here, the theoretical precedents, the main physical components of the models, and their application to describe dynamical measurements in halide perovskite devices are summarized. The application of several measurement methods is analyzed, as the current–voltage curves at different scan rates, the impedance spectroscopy response, and the time transients. The transition from normal (capacitive) to inverted (inductive) hysteresis, and the convergence of current–voltage curves to a stable value, are described. It is proposed that neuron‐style models capture dynamical complexity with a favorable economy of parameters, toward the identification of the dominant global dynamic processes across a wide voltage span that determines the practical response of different types of devices.

show abstract

Discerning rise time constants to quantify charge carrier extraction in perovskite solar cells

Abstract: The small-perturbation analysis of perovskite solar cells (PSCs) highlights a fundamental conundrum - while time domain measurements yield two time constants corresponding to the rise and subsequent decay of the...

Cited by 2 publications

References 55 publications

Multiwalled Carbon Nanotubes as Hole Collectors in Inverted Perovskite Solar Cells

Multiwalled Carbon Nanotubes as Hole Collectors in Inverted Perovskite Solar Cells

Hysteresis, Impedance, and Transients Effects in Halide Perovskite Solar Cells and Memory Devices Analysis by Neuron‐Style Models

Contact Info

Product

Resources

About