Low resistivity ZnO-GO electron transport layer based CH3NH3PbI3 solar cells

Perovskite solar cells (PSCs) have developed rapidly over the past few years, and the power conversion efficiency of PSCs has exceeded 20%. Such high performance can be attributed to the unique properties of perovskite materials, such as high absorption over the visible range and long diffusion length. Due to the different diffusion lengths of holes and electrons, electron transporting materials (ETMs) used in PSCs play a critical role in PSCs performance. As an alternative to TiO ETM, ZnO materials have similar physical properties to TiO but with much higher electron mobility. In addition, there are many simple and facile methods to fabricate ZnO nanomaterials with low cost and energy consumption. This review focuses on recent developments in the use of ZnO ETM for PSCs. The fabrication methods of ZnO materials are briefly introduced. The influence of different ZnO ETMs on performance of PSCs is then reviewed. The limitations of ZnO ETM-based PSCs and some solutions to these challenges are also discussed. The review provides a systematic and comprehensive understanding of the influence of different ZnO ETMs on PSCs performance and potentially motivates further development of PSCs by extending the knowledge of ZnO-based PSCs to TiO -based PSCs.

show abstract

“…The PSC based on this modified ZnO nanorods yields a PCE of 16.1% . Similar results can be obtained by Mg, Go, Sn, In, and Ni doping.…”

Section: The Modification Of Zno Etms For Efficient Pscssupporting

confidence: 81%

Perovskite Solar Cells with ZnO Electron‐Transporting Materials

et al. 2017

View full text Add to dashboard Cite

show abstract

“…However, the disadvantage of TiO 2 is that high-temperature sintering is often required to obtain the desired nanostructures, which is a barrier to low cost and stretchable device fabrication. ZnO is a practical alternative to TiO 2 to the electron transport layer of solar cells [12,13], lasing [14], detectors [14], LED [15], etc. since it is also an n-type material with a wide direct band gap (E g = 3.37 eV at 300 K).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Post-Baking Temperature and Thickness of ZnO Electron Transport Layers for Efficient Planar Heterojunction Organometal-Trihalide Perovskite Solar Cells

et al. 2017

View full text Add to dashboard Cite

Solution-processed zinc oxide (ZnO)-based planar heterojunction perovskite photovoltaic device is reported in this study. The photovoltaic device benefits from the ZnO film as a high-conductivity and high-transparent electron transport layer. The optimal electron transport layer thickness and post-baking temperature for ZnO are systematically studied by scanning electron microscopy, photoluminescence and time-resolved photoluminescence spectroscopy, and X-ray diffraction. Optimized perovskite solar cells (PSCs) show an open-circuit voltage, a short-circuit current density, and a fill factor of 1.04 V, 18.71 mA/cm 2 , and 70.2%, respectively. The highest power conversion efficiency of 13.66% was obtained when the device was prepared with a ZnO electron transport layer with a thickness of~20 nm and when post-baking at 180 • C for 30 min. Finally, the stability of the highest performance ZnO-based PSCs without encapsulation was investigated in detail.

show abstract

“…Pristine graphite depicted a tenacious peak at 26.5° and relocated to 10.8°, as graphite powder was chemically oxidized to form GO through modified Hummers method. Exfoliation of graphite into GO (Ahmed et al 2016;Chao et al 2008) disrupted the basal plane of graphite by adding carbonyl (C=O) and carboxyl (C-OOH) groups located at the edge of graphene nanosheet (Wang et al 2014;Williams & Kamat 2009 Followed by decoration of ZnO NPs on GO nanosheet, the GO nanosheet peak at 10.8° was gone. It was reported that the exfoliation of regular stacks of GO or graphite could diminish or even disappeared the diffraction peak (Chao et al 2008).…”

Section: Results and Discussion Characterization Of Go And Zno-decormentioning

confidence: 99%

Synthesis and Characterization of ZnO-decorated GO Nanocomposite Material with Different ZnO Loading through Sol-gel Method

Rosnan¹,

Teow²,

Mohammad³

et al. 2018

JKUKM

View full text Add to dashboard Cite

This work aimed is to synthesis a well dispersed zinc oxide (ZnO) nanoparticles (NPs) decorated on graphene oxide (GO) nanosheet with a practical way by using sol-gel technique. Zinc acetate dehydrate (Zn(CH 3 COO) 2 •2H 2 O) was used as precursor of ZnO and absolute ethanol as solvent. 1 weight percent (wt%), 5 wt%, 10 wt%, and 20 wt% of ZnO was decorated on GO nanosheet. A series of analysis was carried out to characterize the synthesized ZnO-decorated GO nanocomposite material. The results of XRD analysis show some long area of peak at 25° to 80° allocate for ZnO in the ZnO-decorated GO nanocomposite material. By performing zeta potential analysis, the findings show that there was increment of negative surface charge on ZnO-decorated GO nanocomposite material. The experiment result also found that the hydrodynamic particle size of ZnO-decorated GO nanocomposite material become larger when high ZnO loaded. FESEM micrographs demonstrated that spherical-shaped of ZnO NPs appeared on the GO nanosheet with further proved by EDX where the content of ZnO-decorated GO nanocomposite material was composed by 71.3 wt% of C, 17 wt% of O, and additional element of 11.7 wt% of Zn. Thus, it can summarize that the synthesized ZnO-decorated GO nanocomposite material was high in purity. The findings in this study proved that ZnO NPs loading in ZnO-decorated GO nanocomposite material were successfully synthesized by sol-gel method. A ZnO-decorated GO nanocomposite material with layering ZnO NPs on GO nanosheet was produced.

show abstract

Low resistivity ZnO-GO electron transport layer based CH3NH3PbI3 solar cells

Cited by 28 publications

References 61 publications

Perovskite Solar Cells with ZnO Electron‐Transporting Materials

Perovskite Solar Cells with ZnO Electron‐Transporting Materials

The Effect of Post-Baking Temperature and Thickness of ZnO Electron Transport Layers for Efficient Planar Heterojunction Organometal-Trihalide Perovskite Solar Cells

Synthesis and Characterization of ZnO-decorated GO Nanocomposite Material with Different ZnO Loading through Sol-gel Method

Contact Info

Product

Resources

About