Control of organic–inorganic halide perovskites in solid-state solar cells: a perspective

Wang, Qiong; Chen, Hongjun; Liu, Gang; Wang, Luyao

doi:10.1007/s11434-015-0734-y

Cited by 40 publications

(27 citation statements)

References 131 publications

(157 reference statements)

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“…The PL decay at the interface of CH3NH3PbI3 perovskite and SnO2 films displays an average time constant of τe=(5.1±0.4) ns, whereas for the TiO2, τe is (5.5±0.4) ns, both of which are shorter than the perovskite layer on glass (78±0.5) ns, indicating that charge carriers within the CH3NH3PbI3 perovskite layer can be dissociated effectively by these inorganic oxides [42]. The shorter exciton (electron hole pair) lifetime observed with SnO2 ESL suggests a faster charge-transfer kinetics, and it is an indicator of lower defect concentration and good crystalline quality [9,22,43]. The efficient carrier dissociation in SnO2-based solar cells results from the high carrier mobility or lower conduction band level of SnO2 electron selective layer.…”

Section: Resultsmentioning

confidence: 96%

“…Recent progress in perovskite solar cells (PSCs) has attracted great attention due to the rapid improvement of their power conversion efficiency (PCE) from initial 3.8% in 2009 to certified 22.1% in 2016 [1][2][3][4][5][6][7][8][9]. Selective extraction of photo-generated electrons and holes that inhibits charge recombination is necessary for achieving high efficiency in PSCs [10], and the exploration of the effective electron selective layer (ESL) remains a challenging scientific issue.…”

Section: Introductionmentioning

confidence: 99%

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A sintering-free, nanocrystalline tin oxide electron selective layer for organometal perovskite solar cells

Zhao

Liu

et al. 2017

Sci. China Mater.

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Effective electron selective layer (ESL) is critical for the power conversion efficiency in organometal halidebased perovskite solar cells (PSCs). In this work, a spincoating process has been developed to fabricate high quality nanocrystalline SnO2 film at 100°C without further sintering at higher temperature. When used as ESL in PSCs, such SnO2 film shows greater electron extraction ability and higher efficiency than TiO2 film processed under similar condition, as evidenced by the efficient time-resolved photoluminescence (TRPL) quenching SnO2/CH3NH3PbI3 film. As a result, the SnO2-based PSCs possess higher open circuit voltage of 0.91 V, short circuit current density of 20.73 mA cm -2 , and fill factor of 64.25%, corresponding to a conversion efficiency of 12.10%, compared with 7.16% of TiO2-based PSCs. This demonstrates the great potential of applying spin-coating sintering-free process for the low-cost and large-scale manufacturing of PSCs.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

A sintering-free, nanocrystalline tin oxide electron selective layer for organometal perovskite solar cells

Zhao

Liu

et al. 2017

Sci. China Mater.

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“…Although the new perovskite solar cell is a hot topic nowadays [4,5], it has been limited by some essential issues as toxicity, stability etc. [6,7]. Therefore, the research of DSSCs is still significant for developing low-cost solar cells.…”

Section: Introductionmentioning

confidence: 99%

WB crystals with oxidized surface as counter electrode in dye-sensitized solar cells

et al. 2017

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Tungsten boride (WB) crystals, whose surface tends to be oxidized when exposed to air, were demonstrated to have a comparable activity to platinum as counter electrode material in dye-sensitized solar cells (DSSCs). The synergistic effect of both catalytically active surface layer WO x and electronically conductive internal WB is considered to be responsible for the high activity of the WB crystals.

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“…TiO2 thin films are often used as photoanode in new generation thin film solar cells, such as dye-sensitized solar cell [6], perovskite solar cell [7] and quantum dot solar cell [8]. Nowadays the thin film solar cells based on organolead halide perovskite (CH3NH3PbI3) have attracted a lot of interest and enthusiasm due to their higher absorption coefficient, long carrier diffusion length, suitable band gap (about 1.5 eV) and high electronic qualities [9][10][11][12][13]. The cell structure has been extended from solid-state perovskite-sensitized solar cell to planar heterojunction solar cell [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Impact of sol aging on TiO2 compact layer and photovoltaic performance of perovskite solar cell

et al. 2016

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Perovskite solar cells are known to have a power conversion efficiency dependent on subtle variation in chemical composition and crystal and microstructures of materials, processing conditions, and device fabrication procedures and conditions. The present work demonstrates such strong dependence of power conversion efficiency on a TiO2 film made of the same sol with various aging time. A dense and conformal TiO2 film was prepared by sol-gel method, and the influences of its surface morphology and thickness on performance of perovskite solar cells have been investigated. The surface morphology and thickness of the TiO2 film were tuned by adjusting the aging time of sol, resulting in enhanced short-circuit current density and fill factor of the perovskite solar cells due to increased coverage and roughness of perovskite films, light refraction, and effective charge recombination blocking effect, which were verified by means of the light absorption spectra, photoluminescence of perovskite films with and without hole transport layer, cyclic voltammogram, and electrochemical impedance spectra. The cells with a dense and conformal TiO2 compact layer derived from the sol aged for 4 h exhibit a power conversion efficiency of 15.7%, 50% higher than the efficiency based on TiO2 layer derived from 0 h aging sol and 3 times of the efficiency with TiO2 layer made from 8 h aged sol.

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Control of organic–inorganic halide perovskites in solid-state solar cells: a perspective

Cited by 40 publications

References 131 publications

A sintering-free, nanocrystalline tin oxide electron selective layer for organometal perovskite solar cells

A sintering-free, nanocrystalline tin oxide electron selective layer for organometal perovskite solar cells

WB crystals with oxidized surface as counter electrode in dye-sensitized solar cells

Impact of sol aging on TiO2 compact layer and photovoltaic performance of perovskite solar cell

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