Performance enhancement of perovskite solar cells by doping TiO2 blocking layer with group VB elements

Song, Jian; Li, S.P.; Zhao, Yulong; Yuan, Jian; Zhu, Yanqing; Yu, Fuliang; Zhu, Lei; Gu, Xiuquan; Ye, Qiang

doi:10.1016/j.jallcom.2016.10.106

Cited by 72 publications

(37 citation statements)

References 39 publications

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“…The V fb of various CLs shown in Table reveals that ED‐CL has the least negative V fb , indicating that ED‐CL has the most favorable band position for charge extraction from perovskite or a TiO 2 scaffold . For W , because the depletion zone can be regarded as a bulk resistance from the films to glass, the narrower W means less contact resistance at that interface, which facilitates charge extraction at both adjacent interfaces of the CL .…”

Section: Resultsmentioning

confidence: 99%

Electrodeposited TiO₂ Film with Mossy Nanostructure for Efficient Compact Layer in Scaffold‐Type Perovskite Solar Cell

Hsieh

Wei

2018

Solar RRL

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A quality compact layer (CL) with a thin and pinhole‐free structure is essential for an efficient perovskite solar cell (PSC). This study offers a new perspective regarding a criterion of a quality CL, namely three‐dimensional interfacial contact. In an examination of the deposition mechanisms, film morphologies, and optical and electronic properties of CLs fabricated using different methods, an electrodeposited (ED) TiO2 CL outperformed other TiO2 CLs. This is not only because of its ultrathin, fully covered morphology but also because of its mossy structure, which provides high shunt resistance and low ohmic resistance in ED‐TiO2‐based PSCs. In addition, our results confirm that in scaffold‐type PSCs, the CL provides a charge extraction function in addition to the mesoporous scaffold, which is designed as the main electron transporting layer.

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Section: Resultsmentioning

confidence: 99%

Electrodeposited TiO₂ Film with Mossy Nanostructure for Efficient Compact Layer in Scaffold‐Type Perovskite Solar Cell

Hsieh

Wei

2018

Solar RRL

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“…[142] In a study by Yin et al, a compact Nb-doped TiO 2 layer was used, resulting in a PCE of 10.2%. [146] In one early work, Maneski et al demonstrated that Mgdoped TiO 2 nanorods can enhance V oc by 215 mV compared with pure TiO 2 (587 mV), and achieved a modest efficiency of 4.1%. Kim et al reported the fabrication of PSCs using ≈30 nm Nbdoped TiO 2 nanoparticles as the ETM.…”

Section: Doped Tiomentioning

confidence: 99%

Metal Oxides as Efficient Charge Transporters in Perovskite Solar Cells

Haque

Sheikh

Guan

et al. 2017

Advanced Energy Materials

163

121

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Over the past few years, hybrid halide perovskites have emerged as a highly promising class of materials for photovoltaic technology, and the power conversion efficiency of perovskite solar cells (PSCs) has accelerated at an unprecedented pace, reaching a record value of over 22%. In the context of PSC research, wide‐bandgap semiconducting metal oxides have been extensively studied because of their exceptional performance for injection and extraction of photo‐generated carriers. In this comprehensive review, we focus on the synthesis and applications of metal oxides as electron and hole transporters in efficient PSCs with both mesoporous and planar architectures. Metal oxides and their doped variants with proper energy band alignment with halide perovskites, in the form of nanostructured layers and compact thin films, can not only assist with charge transport but also improve the stability of PSCs under ambient conditions. Strategies for the implementation of metal oxides with tailored compositions and structures, and for the engineering of their interfaces with perovskites will be critical for the future development and commercialization of PSCs.

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“…For the surface or structural modification of selective contacts, TiO 2 doped with lithium ion exhibited hysteresis‐less behavior . In addition, other ions such as indium, sodium, niobium and transition metal ions were used to modify surface or defect of TiO 2 , which reduced nonradiative recombination in perovskite near TiO 2 and thereby hysteresis was substantially reduced. The CsX (X = I and Br) doped mesoporous TiO 2 was found to show no significant hysteresis as compared to the bare TiO 2 , which was attributed to less charge accumulation at perovskite/CsX‐doped TiO 2 interface .…”

Section: Introductionmentioning

confidence: 99%

On the Current–Voltage Hysteresis in Perovskite Solar Cells: Dependence on Perovskite Composition and Methods to Remove Hysteresis

2019

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Current‐density–voltage (J–V) hysteresis in perovskite solar cells (PSCs) is a critical issue because it is related to power conversion efficiency and stability. Although parameters affecting the hysteresis have been already reported and reviewed, little investigation is reported on scan‐direction‐dependent J–V curves depending on perovskite composition. This review investigates J–V hysteric behaviors depending on perovskite composition in normal mesoscopic and planar structure. In addition, methodologies toward hysteresis‐free PSCs are proposed. There is a specific trend in hysteresis in terms of J–V curve shape depending on composition. Ion migration combined with nonradiative recombination near interfaces plays a critical role in generating hysteresis. Interfacial engineering is found to be an effective method to reduce the hysteresis; however, bulk defect engineering is the most promising method to remove the hysteresis. Among the studied methods, KI doping is proved to be a universal approach toward hysteresis‐free PSCs regardless of perovskite composition. It is proposed from the current studies that engineering of perovskite film near the electron transporting layer (ETL) and the hole transporting layer (HTL) is of vital importance for achieving hysteresis‐free PSCs and extremely high efficiency.

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Performance enhancement of perovskite solar cells by doping TiO2 blocking layer with group VB elements

Cited by 72 publications

References 39 publications

Electrodeposited TiO₂ Film with Mossy Nanostructure for Efficient Compact Layer in Scaffold‐Type Perovskite Solar Cell

Electrodeposited TiO₂ Film with Mossy Nanostructure for Efficient Compact Layer in Scaffold‐Type Perovskite Solar Cell

Metal Oxides as Efficient Charge Transporters in Perovskite Solar Cells

On the Current–Voltage Hysteresis in Perovskite Solar Cells: Dependence on Perovskite Composition and Methods to Remove Hysteresis

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Performance enhancement of perovskite solar cells by doping TiO2 blocking layer with group VB elements

Cited by 72 publications

References 39 publications

Electrodeposited TiO2 Film with Mossy Nanostructure for Efficient Compact Layer in Scaffold‐Type Perovskite Solar Cell

Electrodeposited TiO2 Film with Mossy Nanostructure for Efficient Compact Layer in Scaffold‐Type Perovskite Solar Cell

Metal Oxides as Efficient Charge Transporters in Perovskite Solar Cells

On the Current–Voltage Hysteresis in Perovskite Solar Cells: Dependence on Perovskite Composition and Methods to Remove Hysteresis

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Electrodeposited TiO₂ Film with Mossy Nanostructure for Efficient Compact Layer in Scaffold‐Type Perovskite Solar Cell

Electrodeposited TiO₂ Film with Mossy Nanostructure for Efficient Compact Layer in Scaffold‐Type Perovskite Solar Cell