Two‐Step Physical Deposition of a Compact CuI Hole‐Transport Layer and the Formation of an Interfacial Species in Perovskite Solar Cells

Gharibzadeh, Saba; Nejand, Bahram Abdollahi; Moshaii, Ahmad; Mohammadian, Nasim; Mohammadpour, Rahele; Ahmadi, Vahid; Alizadeh, Abdolali

doi:10.1002/cssc.201600132

Cited by 68 publications

(37 citation statements)

References 49 publications

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“…High hole mobility of CuI (~9.3 cm 2 V −1 s −1 ) which is five orders of magnitude greater than that of Spiro OMeTAD (~10 −4 cm 2 V −1 s −1 ) still en courages its use in mesoscopic PSCs (Fig. 12b) [198]. A key obstacle was to deposit CuI from solution as solvents used to dissolve it can dissolve the perovskite layer also.…”

Section: Copper Iodide (Cui)mentioning

confidence: 99%

Advances in hole transport materials engineering for stable and efficient perovskite solar cells

et al. 2017

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This article reviews the various hole transporting materials (HTMs) used in perovskite solar cells (PSCs) in achieving high photo conversion efficiency (PCE) and operational stability. The PSCs are the latest development in solution processable solar cells offering PCE (~22%) on a par with that of practically deployed silicon and thin film solar cells. HTMs and electron transporting materials (ETMs) are important constituents in PSCs as they selectively transport charges within the device, influence photovoltaic parameters, determine device stability and also influence its cost. This article critically approaches role of structure, electrochemistry, and physical properties of varied of choice of HTMs categorized diversely as small and long polymers, organometallic, and inorganic on the photovoltaic parameters of PSCs conceived in various device configurations. Achievements in tailoring the properties of HTMs to best fit for PSCs are detailed; a well designed HTM suppresses carrier recombination by facilitating the passage of holes but blocking electrons at the HTM/perovskite interface. Moreover, in many PSCs the HTM acts as the first line of defense to external degrading factors such as humidity, oxygen and photon dose, the extent of which depends on its hydrophobicity, permeability, and density.

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Section: Copper Iodide (Cui)mentioning

confidence: 99%

Advances in hole transport materials engineering for stable and efficient perovskite solar cells

et al. 2017

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“…In 2016, Moshaii et al, obtained a CuI thin film as HTM. A gas‐solid reaction was employed to avoid the excessive wetting and dissolution . The best PCE was 7.4% with a low hysteresis in the normal PSC architecture of fluorine‐doped tin oxide (FTO)/TiO 2 /CH 3 NH 3 PbI 3 /CuI/Au.…”

Section: Dopant‐free Hole Transporting Materials For Pscsmentioning

confidence: 99%

Dopant‐Free Hole Transporting Materials for Perovskite Solar Cells

Rezaee

Liu

et al. 2018

Solar RRL

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This article reviews various dopant-free hole transporting materials (HTMs) used in perovskite solar cells (PSCs) in three main categories including inorganic, polymeric, and small molecule HTMs. PSCs have undergone rapid progress, achieving power conversion efficiencies (PCEs) above 22%. With their low production cost and high efficiencies, PSCs are considered promising next-generation solar cell technology. In all developed architectures for PSCs, including planar and mesoscopic with conventional and inverted structures, HTMs play a significant role in determining the photovoltaic performance of PSCs. Using p-type dopants, however, is considered a common strategy to increase the hole conductivity of HTM, which is usually compensated by a more complicated fabrication procedure, higher production costs, and lower stability of PSC. Although several reviews on HTMs have been published, progress on dopant free HTMs needs to be reviewed and analyzed. Here, a review covering most of the published reports on dopantfree HTMs is presented, and the device structure and fabrication method, HTM layer deposition techniques, and the efficiency and the stability of PSCs are addressed during discussions in each main category. Finally, an outlook on stability and PCE growth in PSCs based on dopant-free HTMs is presented.

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“…CuI was initially studied as HTL in conventional n‐i‐p PSCs. However, the PCEs were rather low, with a maximum value of merely 7.5 % . Recently, CuI was also applied as HTL in inverted planar PSCs.…”

Section: Introductionmentioning

confidence: 99%

“…The thickness of the CuI film can be controlled by adjusting the thickness of the Cu layer. Recently, Moshaii and co‐workers successfully fabricated CuI by using this method in conventional n‐i‐p PSCs . A uniform and well‐controlled CuI film was fabricated on a perovskite layer by exposing a Cu film to iodine vapor.…”

Section: Introductionmentioning

confidence: 99%

Efficient and Stable Inverted Planar Perovskite Solar Cells Employing CuI as Hole‐Transporting Layer Prepared by Solid–Gas Transformation

et al. 2017

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The inorganic p‐type semiconductor CuI possesses several unique characteristics such as high transparency, low‐production cost, high hole mobility, and good chemical stability and is a promising hole‐transporting material candidate that can be explored in solar‐cell devices. Herein, we adopt a simple solid–gas reaction method to fabricate a uniform CuI film by exposing a thermally evaporated copper film to iodine vapor and apply it as a hole‐transporting layer (HTL) in inverted planar perovskite solar cells (PSCs). The optimized devices display a promising power conversion (PCE) efficiency of 14.7 %, with an open‐circuit voltage of 1.04 V, a short‐circuit current density of 20.9 mW cm−2, and a fill factor of 0.68. This is one of the highest PCE values reported so far for CuI‐based HTL in PSCs. Moreover, the devices studied also exhibit good long‐term stability at ambient atmosphere, arising from the hydrophobicity of CuI HTL. The results highlight that CuI fabricated using the simple and low‐temperature processing method presented here holds great promise as low‐cost alternative HTL material for the development of efficient and stable inverted planar PSCs in the future.

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Two‐Step Physical Deposition of a Compact CuI Hole‐Transport Layer and the Formation of an Interfacial Species in Perovskite Solar Cells

Cited by 68 publications

References 49 publications

Advances in hole transport materials engineering for stable and efficient perovskite solar cells

Advances in hole transport materials engineering for stable and efficient perovskite solar cells

Dopant‐Free Hole Transporting Materials for Perovskite Solar Cells

Efficient and Stable Inverted Planar Perovskite Solar Cells Employing CuI as Hole‐Transporting Layer Prepared by Solid–Gas Transformation

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