Investigating the charge carrier transport within the hole-transport material free perovskite solar cell processed in ambient air

Bhatt, Parth; Pandey, Kavita; Yadav, Pankaj; Tripathi, Brijesh; Kanth, P. Chandra; Pandey, Manoj Kumar; Kumar, Manoj

doi:10.1016/j.solmat.2015.04.028

Cited by 56 publications

(26 citation statements)

References 44 publications

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“…Along with the major peaks, the minor peaks at 2θ values of 39.2°, 45.2°, 50.1°, 59.4° and 70.6°corresponds to the reflection plane (103), (104), (105), (110) and (201) 16 . The obtained diffraction pattern is in well agreement with MoS 2 (JCPDS 37-1492) and reports by other authors 20 21 . By using the XRD spectra shown in Fig.…”

Section: Resultssupporting

confidence: 91%

First step to investigate nature of electronic states and transport in flower-like MoS2: Combining experimental studies with computational calculations

Pandey

Yadav

Singh

et al. 2016

Sci Rep

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In the present paper, the nature of electronic states and transport properties of nanostructured flower-like molybdenum disulphide grown by hydrothermal route has been studied. The band structure, electronic nature of charge, thermodynamics and the limit of phonon scattering through density functional theory (DFT) has also been studied. The band tail states, dynamics of trap states and transport of carriers was investigated through intensive impedance spectroscopy analysis. The direct fingerprint of density and band tail state is analyzed from the capacitance plot as capacitance reflects the capability of a semiconductor to accept or release the charge carriers with a corresponding change in its Fermi potential levels. A recently introduced infrared photo-carrier radiometry and density functional perturbation theory (DFPT) techniques have been used to determine the temperature dependence of carrier mobility in flower type-MoS2. The present study illustrates that a large amount of trapped charges leads to an underestimation of the measured effective mobility and the potential of the material. Thus, a continuous engineering effort is required to improve the quality of fabricated nanostructures for its potential applications.

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Section: Resultssupporting

confidence: 91%

First step to investigate nature of electronic states and transport in flower-like MoS2: Combining experimental studies with computational calculations

Pandey

Yadav

Singh

et al. 2016

Sci Rep

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“…This cell pattern, however, depends on the work function of the back contact with energy of the valence band (E v_absorber ). This simulation is further supported experimentally by another literature [37]. Although HTM-free PSC is possible, several other researchers proved the importance of having a HTM in PSC is rather important and could affect to a positive increment of several outcomes namely PCE, FF, V oc, decreases the internal resistance of the cell as well as increases the electron lifetime thus promoting electron collection and indirectly preventing electron-hole recombination.…”

Section: Cell Structure and Working Mechanism Of Pscsupporting

confidence: 75%

Progress towards highly stable and lead-free perovskite solar cells

Mutalib

Ludin

Ruzalman

et al. 2018

Mater Renew Sustain Energy

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High-performance perovskite solar cells have attracted increased attention for photovoltaic applications and potentially replacing the predecessor generations. Nevertheless, the stability issues and the lead content has always been among the major concerns that barriers perovskite solar cells from commercialization. This review presents the discussion towards the inherent instability of perovskite solar cells and the development towards replacing lead with discussion towards their performance and challenges. The degradation of perovskite active layer would release toxic substance into the environment. The development towards low-toxic, lead-free and efficient perovskite solar cells is the key for a sustainable solar energy generation with the application of perovskite solar cells.

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“…By using the obtained values of

\propto

and the frequency of the incident photon (

ν

), the optical band gap of CuO nanostructured thin films were calculated. The plot of

{(() \propto boldh ν)}^{1 / boldP}

versus band gap value is shown in the inset of Figure D, where P is the transition probability which is in general equal to 2 and 3/2 for indirect and direct transitions, respectively , . By extrapolating the linear region of the plot, the value of optical bandgap for CuO is obtained as 2.05 eV which is in the range of commonly quoted values , .…”

Section: Resultsmentioning

confidence: 60%

Electrochemical Properties of Highly Sensitive and Selective CuO Nanostructures Based Neurotransmitter Dopamine Sensor

et al. 2017

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In this article, electrochemical properties of CuO nanostructures based dopamine (DA) sensor was investigated. The morphology, structure, optical, and compositional properties of the CuO nanostructures were characterized by using SEM, XRD, UV‐Vis, and XPS techniques. The electrochemical properties were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The CV results indicate that biosensors based on CuO nanostructures exhibit a high selectivity and sensitivity of 0.1975 μA μM–1 toward DA and effectively avoids the interference of ascorbic acid (AA) and uric acid (UA). The obtained EIS spectra for CuO sensors were analysed using an electrical equivalent circuit to understand the bulk and surface response via the capacitive and resistive parameters. The EIS measurement also leads to the direct determination of parameters like series resistance and ion diffusion phenomena at electrode‐electrolyte interface. The experimental CV and EIS results along with their analysis will have a significant impact on understanding the mechanism of high sensitivity and selectivity performance of CuO based sensors. This study may also lay the basis for efficient characterization of biosensors by coupling both the CV and EIS characterization techniques.

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Investigating the charge carrier transport within the hole-transport material free perovskite solar cell processed in ambient air

Cited by 56 publications

References 44 publications

First step to investigate nature of electronic states and transport in flower-like MoS2: Combining experimental studies with computational calculations

First step to investigate nature of electronic states and transport in flower-like MoS2: Combining experimental studies with computational calculations

Progress towards highly stable and lead-free perovskite solar cells

Electrochemical Properties of Highly Sensitive and Selective CuO Nanostructures Based Neurotransmitter Dopamine Sensor

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