Schottky DC generators with considerable enhanced power output and energy conversion efficiency based on polypyrrole-TiO2 nanocomposite

Ding, Xiang; Shao, Huili; Wang, Hongxia; Yang, Weidong; Fang, J.; Zhang, Daquan; Lin, Tong

doi:10.1016/j.nanoen.2021.106367

Cited by 20 publications

(50 citation statements)

References 57 publications

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“…As a result, the device generated a rectified electric output. The same effect is observed in the case of direct-current generators based on p – n [ 78 , 79 , 80 , 81 , 82 ] or Schottky [ 77 , 83 , 84 , 85 ] junctions. Morozovska et al [ 20 ] proposed that the rectification effect of the junction barrier allows the application of a ferroelectric nanowire array fixed between flat electrodes as the direct current generator.…”

Section: Resultssupporting

confidence: 66%

Pyroelectric Nanogenerator Based on an SbSI–TiO2 Nanocomposite

Mistewicz

2021

Sensors

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For the first time, a composite of ferroelectric antimony sulfoiodide (SbSI) nanowires and non-ferroelectric titanium dioxide (TiO2) nanoparticles was applied as a pyroelectric nanogenerator. SbSI nanowires were fabricated under ultrasonic treatment. Sonochemical synthesis was performed in the presence of TiO2 nanoparticles. The mean lateral dimension da = 68(2) nm and the length La = 2.52(7) µm of the SbSI nanowires were determined. TiO2 nanoparticles served as binders in the synthesized nanocomposite, which allowed for the preparation of dense films via the simple drop-casting method. The SbSI–TiO2 nanocomposite film was sandwiched between gold and indium tin oxide (ITO) electrodes. The Curie temperature of TC = 294(2) K was evaluated and confirmed to be consistent with the data reported in the literature for ferroelectric SbSI. The SbSI–TiO2 device was subjected to periodic thermal fluctuations. The measured pyroelectric signals were highly correlated with the temperature change waveforms. The magnitude of the pyroelectric current was found to be a linear function of the temperature change rate. The high value of the pyroelectric coefficient p = 264(7) nC/(cm2·K) was determined for the SbSI–TiO2 nanocomposite. When the rate of temperature change was equal dT/dt = 62.5 mK/s, the maximum and average surface power densities of the SbSI–TiO2 nanogenerator reached 8.39(2) and 2.57(2) µW/m2, respectively.

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Section: Resultssupporting

confidence: 66%

Pyroelectric Nanogenerator Based on an SbSI–TiO2 Nanocomposite

Mistewicz

2021

Sensors

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“…1a schematically illustrates the procedure to prepare PPy and PPy-based Schottky DC generators. Following our previous studies, 17,18 we synthesized PPy using a classical oxidative polymerization method with ferric chloride as the oxidant. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Before studying the effect of the water content on PPy and device energy conversion, we conditioned the PPy discs in a normal state, i.e., placing them in a conditioned room (55% RH and 20 C) for one week before assembling them into Schottky devices for characterization, which was usually used in our previous studies. 18 Fig. 1d and e show the open-circuit voltage (V oc ) and short-circuit current (I sc ) outputs when the Schottky device was subjected to repeated compression and decompression.…”

Section: Resultsmentioning

confidence: 99%

“…17 When nano-titanium dioxide, a non-conductive inorganic oxide, was incorporated into polypyrrole (PPy), the device current output can be increased by 48 times. 18 Several researchers have reported that moisture in PPy can lead to an increase in conductivity. 19,20 This was attributed to a proton jumping within the conducting polymer matrix following the Grotthuss mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Effect of water and DMSO on mechanoelectrical conversion of Schottky DC generators

et al. 2022

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“…The structure and physical characteristics of DDGs have been widely explored, including the dynamic metal‐semiconductor, [ 10 ] semiconductor‐semiconductor, [ 11 ] metal‐semiconducting polymer, [ 12 ] and liquid‐semiconductor structure generators. [ 13 ] However, the voltage performance of vertical DDGs is inferior owing to energy loss during carrier transport and collection, which is usually as low as 0.1–1V and requires further enhancement for wider applications.…”

Section: Introductionmentioning

confidence: 99%

Hot Carrier Transport and Carrier Multiplication Induced High Performance Vertical Graphene/Silicon Dynamic Diode Generator

Shen

et al. 2022

Advanced Science

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Dynamic semiconductor diode generators (DDGs) offer a potential portable and miniaturized energy source, with the advantages of high current density, low internal impedance, and independence of the rectification circuit. However, the output voltage of DDGs is generally as low as 0.1-1 V, owing to energy loss during carrier transport and inefficient carrier collection, which requires further optimization and a deeper understanding of semiconductor physical properties. Therefore, this study proposes a vertical graphene/silicon DDG to regulate the performance by realizing hot carrier transport and collection. With instant contact and separation of the graphene and silicon, hot carriers are generated by the rebounding process of built-in electric fields in dynamic graphene/silicon diodes, which can be collected within the ultralong hot electron lifetime of graphene. In particular, monolayer graphene/silicon DDG outputs a high voltage of 6.1 V as result of ultrafast carrier transport between the monolayer graphene and silicon. Furthermore, a high current of 235.6 nA is generated due to the carrier multiplication in graphene. A voltage of 17.5 V is achieved under series connection, indicating the potential to supply electronic systems through integration design. The graphene/silicon DDG has applications as an in situ energy source for harvesting mechanical energy from the environment.

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Schottky DC generators with considerable enhanced power output and energy conversion efficiency based on polypyrrole-TiO2 nanocomposite

Cited by 20 publications

References 57 publications

Pyroelectric Nanogenerator Based on an SbSI–TiO2 Nanocomposite

Pyroelectric Nanogenerator Based on an SbSI–TiO2 Nanocomposite

Effect of water and DMSO on mechanoelectrical conversion of Schottky DC generators

Hot Carrier Transport and Carrier Multiplication Induced High Performance Vertical Graphene/Silicon Dynamic Diode Generator

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