Evidence for reduced charge recombination in carbon nanotube/perovskite-based active layers

Bag, Monojit; Renna, Lawrence A.; Jeong, Seung Pyo; Han, Xu; Cutting, C L; Maroudas, Dimitrios; Venkataraman, D.

doi:10.1016/j.cplett.2016.09.004

Cited by 42 publications

(23 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two arcs can be identified at low forward bias. The arc at lower frequency is related to the charge recombination and the higher frequency one to the charge transfer at the interfaces of ETL/MAPbI 3 /Spiro‐OMeTAD configured devices . For the device with ZnO–MgO–EA + as ETL, while the transfer resistance ( R tr ) decreases significantly, the recombination resistance ( R rec ) increases remarkably.…”

mentioning

confidence: 99%

Efficient, Hysteresis‐Free, and Stable Perovskite Solar Cells with ZnO as Electron‐Transport Layer: Effect of Surface Passivation

et al. 2018

View full text Add to dashboard Cite

The power conversion efficiency of perovskite solar cells (PSCs) has ascended from 3.8% to 22.1% in recent years. ZnO has been well-documented as an excellent electron-transport material. However, the poor chemical compatibility between ZnO and organo-metal halide perovskite makes it highly challenging to obtain highly efficient and stable PSCs using ZnO as the electron-transport layer. It is demonstrated in this work that the surface passivation of ZnO by a thin layer of MgO and protonated ethanolamine (EA) readily makes ZnO as a very promising electron-transporting material for creating hysteresis-free, efficient, and stable PSCs. Systematic studies in this work reveal several important roles of the modification: (i) MgO inhibits the interfacial charge recombination, and thus enhances cell performance and stability; (ii) the protonated EA promotes the effective electron transport from perovskite to ZnO, further fully eliminating PSCs hysteresis; (iii) the modification makes ZnO compatible with perovskite, nicely resolving the instability of ZnO/perovskite interface. With all these findings, PSCs with the best efficiency up to 21.1% and no hysteresis are successfully fabricated. PSCs stable in air for more than 300 h are achieved when graphene is used to further encapsulate the cells.

show abstract

mentioning

confidence: 99%

Efficient, Hysteresis‐Free, and Stable Perovskite Solar Cells with ZnO as Electron‐Transport Layer: Effect of Surface Passivation

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Figure c shows the Nyquist plots of the ZTO‐based PSC device compared with TiO 2 measured at applied bias voltages ( V app ) of 1.05 V under simulated AM 1.5 G solar illumination. In this condition, the internal electric field was significantly reduced, and charge transport was dominated by diffusion effect . Thus, the electronic transport component ( R elect ) was dominated by electron transport resistance ( R tr ) in the condition.…”

Section: Resultsmentioning

confidence: 94%

Interface Engineering of Cubic Zinc Metatitanate as an Excellent Electron Transport Material for Stable Perovskite Solar Cells

Han

Huang

et al. 2020

Solar RRL

View full text Add to dashboard Cite

Perovskite solar cells (PSCs) have experienced considerable development in the past few years. The stability issue has become a focus of research efforts toward their commercial applications. The development and interface engineering of electron transport materials (ETMs) to build up stable interfaces with perovskites has been emerging as a powerful strategy to enhance PSCs' stability. Herein, cubic zinc metatitanate (ZTO) is identified as an excellent ETM with interface engineering treatment of dezincification for fabricating PSCs with much better overall performances than those fabricated from TiO2, a popularly used ETM. The high electron mobility of ZTO helps minimize the hysteresis. Together with the use of CuSCN as inorganic hole transport material and further protecting the PSCs with reduced graphene oxide, the ZTO‐based PSCs exhibit remarkable enhancement in stability, retaining 95% of initial power conversion efficiency under AM 1.5 G illumination at 85 °C and 85% relative humidity in air for 1000 h at open circuit.

show abstract

“…also introduced functionalized MWCNTs attached with poly(methyl methacrylate) end‐functionalized hexabenzocoronene into perovskite layers and investigated their impact on the charge recombination of the inverted p–i–n structured PSCs. [ 142 ] The PCE of the device containing 0.005 wt% MWCNTs increased from 12.0% to 12.9%. Impedance spectroscopy measurement confirmed that MWCNTs facilitated charge transportation and suppressed charge recombination in PSCs.…”

Section: Carbon Nanotubes In Perovskite Layersmentioning

confidence: 99%

Recent Advances in Carbon Nanotube Utilizations in Perovskite Solar Cells

Luo

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

Metal halide perovskite solar cells (PSCs) have emerged as promising next‐generation photovoltaic devices with the maximum output efficiency exceeding 25%. Despite significant advances, there are many challenges to achieve high efficiency, stability, and low‐cost simultaneously. Combating these challenges depends on developing novel materials and modifying conventional device components. Carbon nanotubes (CNTs) have attracted considerable attention for fabricating efficient PSCs owing to their remarkable electrical, optical, and mechanical properties. With their multifunctional features, CNTs can play a wide range of roles and offer unique benefits in various components in PSCs to improve device performance and durability. Here, recent progress concerning the utilizations of CNTs as transparent conductive electrodes, charge‐transporter, perovskite additives, interlayers, hole‐transporting materials, and back electrodes in PSCs is comprehensively reviewed. The application of CNTs toward the development of 1D and 2D flexible PSCs is also discussed. A summary of current challenges and prospective on future research directions of employing CNTs to realize high‐performance PSCs is presented.

show abstract

Evidence for reduced charge recombination in carbon nanotube/perovskite-based active layers

Cited by 42 publications

References 56 publications

Efficient, Hysteresis‐Free, and Stable Perovskite Solar Cells with ZnO as Electron‐Transport Layer: Effect of Surface Passivation

Efficient, Hysteresis‐Free, and Stable Perovskite Solar Cells with ZnO as Electron‐Transport Layer: Effect of Surface Passivation

Interface Engineering of Cubic Zinc Metatitanate as an Excellent Electron Transport Material for Stable Perovskite Solar Cells

Recent Advances in Carbon Nanotube Utilizations in Perovskite Solar Cells

Contact Info

Product

Resources

About