A fluorene-terminated hole-transporting material for highly efficient and stable perovskite solar cells

Jeon, Nam Joong; Na, Hyejin; Jung, Eui Hyuk; Yang, Tae‐Youl; Lee, Yong Guk; Kim, Geunjin; Shin, Hyun Cheol; Seok, Sang Il; Lee, Jaemin; Seo, Jangwon

doi:10.1038/s41560-018-0200-6

Cited by 1,958 publications

(1,324 citation statements)

References 34 publications

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“…[16] Nowadays, one can meet only few works on highly performing MAPbI 3 perovskites based on non-iodide lead precursor compounds. [23][24][25][26][27][28][29] These latest results were actually the motivation for us to write this review. To form a properly crystalline iodide or iodide/ bromide, perovskite and achieve high performance in solar cells, sources containing only iodide and bromide salts (PbI 2 , PbBr 2 , MAI, FAI, CsI, MABr) are typically used as precursor materials.…”

Section: Introductionmentioning

confidence: 93%

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Kosmatos

Theofylaktos

Giannakaki

et al. 2019

Energy & Environ Materials

103

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Lead halide perovskites of the type APbX3 (where A = methylammonium MA, formamidinium FA, or cesium and X = iodide and bromide), in a single‐crystal form or more often as polycrystalline films, have already shown unique optoelectronic properties, comparable with those of the best single‐crystal semiconductors. To form a properly crystalline iodide or iodide/bromide, perovskite and achieve high performance in solar cells, sources containing only iodide and bromide salts (PbI2, PbBr2, MAI, FAI, CsI, MABr) are typically used as precursor materials. However, recently, most of the record perovskites contain MACl as additive to control their crystallization, revisiting the importance of methylammonium cation excess and chloride incorporation in perovskites, previously highlighted by Snaith's group back in 2012. Here, we review the background and recent progress in MACl‐mediated crystallization of perovskites, as well as the impact of the additive in solar cells. In particular, we describe the current understanding of the mechanism of perovskite crystallization process and defect passivation at grain boundaries in the presence of MACl. We then discuss the spectacular results (in terms of record efficiencies, stability, and up‐scaling) that have been delivered by solar cells employing MACl‐incorporated perovskites, and give an outlook of future research avenues that might bring perovskite solar cells closer to commercialization.

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Section: Introductionmentioning

confidence: 93%

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Kosmatos

Theofylaktos

Giannakaki

et al. 2019

Energy & Environ Materials

103

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“…[10,15] In addition, state-of-the-art polymericH TMs are often extremely expensive, and their prices are even highert han that of Au. PSCs are generally composed of al ight-absorbing lead halide perovskite film surrounded by layers for selective extraction and transport of charge carriers, and conductive electrodes (usually transparent conductive oxide/glass and Au) are placed at the outmost part.…”

Section: Pscsmentioning

confidence: 99%

“…Among these systems, solar cells are considered to be one of the most promising renewable energy sources. [7][8][9][10] Althought he overall costs of materials for these organic-inorganic solar cellsa re quite competitive, there are still costly components in state-of-the-art designs. [2,3] For instance, dye-sensitized solar cells (DSCs) are aesthetically feasible and have incomparably high performances under ambient lighting conditions, [4][5][6] and perovskite solar cells (PSCs) have aw ide range of cell design and configurations, while their capabilities for solar energy conversion are now comparable to those of conventionals ilicon photovoltaics.…”

Section: Introductionmentioning

confidence: 99%

“…[2,3] For instance, dye-sensitized solar cells (DSCs) are aesthetically feasible and have incomparably high performances under ambient lighting conditions, [4][5][6] and perovskite solar cells (PSCs) have aw ide range of cell design and configurations, while their capabilities for solar energy conversion are now comparable to those of conventionals ilicon photovoltaics. [10,[13][14][15] Pursuits for advanced materials to replace those economically unfavorable parts are being carriedo ut intensively,a nd various metal compoundsh ave shown excellent results. From the very beginning, platinum electrocatalysts have been employed in the counter electrodes (CEs) of DSCs, [11,12] and the prices of poly-meric hole-transport materials (HTMs) for PSCs are higher than that of gold.…”

Section: Introductionmentioning

confidence: 99%

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Recent Progress in the Design and Synthesis of Nitrides for Mesoscopic and Perovskite Solar Cells

Kang

Sung

2019

ChemSusChem

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With growing concerns about global warming and the energy crisis, a variety of photovoltaic devices have attracted worldwide attention as alternative energy sources. Among them, organic–inorganic hybrid photovoltaics, typically mesoscopic and perovskite solar cells, are promising, owing to their potential for low‐cost energy production, which mainly comes from unlimited combinations of materials optimized for each step of solar energy conversion. However, the commercialization of organic–inorganic hybrid solar cells is hampered by costly electrocatalysts or hole‐transport materials. Currently, state‐of‐the‐art dye‐ or quantum‐dot‐sensitized solar cells and perovskite solar cells necessitate noble metals and high‐price polymeric materials. In an attempt to resolve this issue, various kinds of metal compounds have been investigated, and nitrides have been actively reported to possess a number of favorable properties for the aforementioned purpose, such as excellent electrical conductivity and superb electrocatalytic performance. Herein, the use of nitrides as cost‐effective electrocatalysts or hole‐transport materials in organic–inorganic hybrid solar cells is reviewed. Nitrides with a variety of morphologies and scales are discussed, together with the synergistic effect in the case of diverse composites. In addition, prospects and challenges for applying nitride materials are briefly suggested.

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“…[1][2][3][4][5][6] Improvements in efficiency,f lexibility,a nd manufacturing temperature have received considerable research attention. [1][2][3][4][5][6] Improvements in efficiency,f lexibility,a nd manufacturing temperature have received considerable research attention.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Flexible Perovskite Solar Cells with Effective Interfacial Optimization Processed at Low Temperatures

et al. 2018

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Exploration of low‐temperature solution‐processing methodologies for fabricating planar perovskite solar cells (PSCs) is important for industrial mass production and helps simplify the manufacture and design of flexible perovskite solar cells. However, the interface between electron‐transport layers (ETLs) and perovskite layers is crucial for the development of highly efficient flexible PSCs. We report a drastically improved solar cell efficiency through surface optimization of TiO2 ETLs by using a simple and inexpensive ionic compound that shows high optical transparency and superior electron mobility. Solution‐derived TiO2 nanocrystalline films are employed at low temperatures as ETLs through solution processing. The modification of TiO2 with NH4Cl can increase the interactions between the surface and organic–inorganic hybrid perovskites; Cl anions lead to a stronger interfacial coupling between TiO2 and perovskite. Ammonium cations tend to combine with perovskite. Due to this strong combined effect of the ionic compound, the efficiency of PSC from low‐temperature solution processing reaches 18.71 % on rigid glass/indium tin oxide (ITO) for an improvement of 12.6 % over a control device using bare TiO2. Furthermore, the power conversion efficiency (PCE) can reach an efficiency of 17.69 % for the ITO/PEN substrates. This work contributes to the evolution of flexible PSCs with simple fabrication and high device performance.

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A fluorene-terminated hole-transporting material for highly efficient and stable perovskite solar cells

Cited by 1,958 publications

References 34 publications

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Recent Progress in the Design and Synthesis of Nitrides for Mesoscopic and Perovskite Solar Cells

High‐Performance Flexible Perovskite Solar Cells with Effective Interfacial Optimization Processed at Low Temperatures

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