Compact Layer Free Perovskite Solar Cells with 13.5% Efficiency

Liu, Dianyi; Yang, Jingsi; Kelly, Timothy L.

doi:10.1021/ja508758k

Cited by 437 publications

(350 citation statements)

References 49 publications

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“…They demonstrated that the absence of ZnO ETM had slight impact on photovoltaic parameters of corresponding ETM‐free perovskite solar cell, which was mostly ascribed to the largely reduced charge recombination offsetting increased contact resistance at MAPbI 3 /ITO surface, resulting in a competitive PCE of 13.5% in regard to device with ETM. Moreover, as‐fabricated ETM‐free device possessed an enhanced thermal stability 103. These unique properties of HTM‐free and ETM‐free architectures consequently help form cost‐effective, simplified and high performance perovskite solar cells.…”

Section: Htm and Etm‐free Architecturesmentioning

confidence: 99%

High Performance Perovskite Solar Cells

et al. 2015

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Perovskite solar cells fabricated from organometal halide light harvesters have captured significant attention due to their tremendously low device costs as well as unprecedented rapid progress on power conversion efficiency (PCE). A certified PCE of 20.1% was achieved in late 2014 following the first study of long‐term stable all‐solid‐state perovskite solar cell with a PCE of 9.7% in 2012, showing their promising potential towards future cost‐effective and high performance solar cells. Here, notable achievements of primary device configuration involving perovskite layer, hole‐transporting materials (HTMs) and electron‐transporting materials (ETMs) are reviewed. Numerous strategies for enhancing photovoltaic parameters of perovskite solar cells, including morphology and crystallization control of perovskite layer, HTMs design and ETMs modifications are discussed in detail. In addition, perovskite solar cells outside of HTMs and ETMs are mentioned as well, providing guidelines for further simplification of device processing and hence cost reduction.

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Section: Htm and Etm‐free Architecturesmentioning

confidence: 99%

High Performance Perovskite Solar Cells

et al. 2015

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“…Liu et al deposited CH 3 NH 3 PbI 3 directly onto ITO by using a sequential deposition method and achieved a 13.5% PCE. [ 53 ] Ke et al reported ETL-free cells with a 14.1% PCE by directly forming CH 3 NH 3 PbI 3-x Cl x fi lm on FTO. [ 54 ] They suggested that the key for obtaining effi cient ETL-free cells is to prepare uniform perovskite fi lms with good crystallinity, avoiding shunting paths between HTL and FTO.…”

Section: Etl-free Cellsmentioning

confidence: 99%

Advances in Perovskite Solar Cells

et al. 2016

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widely commercialized, but possiblities to increase their performance are limited, because nowadays the so-called balance of systems (BoS) cost of PV modules makes up most of the cost. [ 1 ] As much of the BoS scales with area, performance improvement seems the only way to decrease the cost of PV power further. Therefore, new PV cells are sought either to allow for higher effi ciencies than what is possible with Si PV without cost increase, or, as explained in section 3.4, to provide lowcost added effi ciency to Si PV. Emerging solar cells such as dye-sensitized, bulkheterojunction and quantum-dot solar cells can be fabricated via low-temperature solution processing, that holds promise for low-cost large scale application, but best power conversion effi ciencies (PCE) are half of, or less than that of the best commercial Si PV cells. [ 2 ] This is where perovskite solar cells enter, as for the fi rst time in PV history it is possible to produce high-effi ciency cells at low monetary and energy costs, with apparent ease of fabrication from earth-abundant, readily available raw materials. The PCE for perovskite solar cells has increased from 2.2% to 20.1% since 2006, showing an inviting vista of commercialization. [ 3,4 ] Perovskite solar cells are named after the crystal structure of the light absorbers, the structure of the mineral CaTiO 3 . Many compounds with ABX 3 stoichiometry take this structure, where A and B are 12-and 8-coordinates cations, respectively, and X is the anion. [ 4 ] Of the many ABX 3 only few are suitable to be efficient light absorbers for solar cells due to requirements such as appropriate bandgap for good light-harvesting ability, energy level/band alignment with contacting materials, long charge carrier lifetime, τ, and high mobility, µ. Perovskites generally have divalent anions, and the strong electrostatic bonding mostly makes their (high) bandgaps not suitable for solar PV. Mitzi et al. initiated using perovskites containing halides, ammonium cations and Sn 2+ in optoelectronic devices, which formed the basis for the development of perovskites for solar cells. [ 5 ] Here we will focus on such halide perovskites, together with one divalent (Pb 2+ ) and one monovalent (mostly CH 3 NH 3 + ) cation. The most effi cient halide perovskite solar absorbers consist of organic ammonium ions (CH 3 NH 3 + or NH = CHNH 3 + ), Pb 2+ and halide ions (I − , Br − ).[ 4 ] CH 3 NH 3 PbI 3 possesses broad and intense light absorption. It is an ambipolar semiconductor (can be n-or p-type), and its charge carriers can have long diffusion lengths and lifetimes, which allow excellent PCE for solar cells made with it. [3][4][5][6] Another advantage of perovskite absorbers is the low-temperature solution-processing ability, which helps

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“…Perovskite solar cells have emerged as competitive solution‐processed candidates for photovoltaic applications due to the demonstration of high power conversion efficiency (PCE), ease of fabrication, and low materials cost 1, 2, 3, 4, 5, 6, 7, 8, 9. The efficiency of perovskite solar cells has rapidly risen from 3.8% to over 22.1% just within the past several years 10, 11.…”

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confidence: 99%

Aqueous‐Containing Precursor Solutions for Efficient Perovskite Solar Cells

et al. 2017

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Perovskite semiconductors have emerged as competitive candidates for photovoltaic applications due to their exceptional optoelectronic properties. However, the impact of moisture instability on perovskite films is still a key challenge for perovskite devices. While substantial effort is focused on preventing moisture interaction during the fabrication process, it is demonstrated that low moisture sensitivity, enhanced crystallization, and high performance can actually be achieved by exposure to high water content (up to 25 vol%) during fabrication with an aqueous‐containing perovskite precursor. The perovskite solar cells fabricated by this aqueous method show good reproducibility of high efficiency with average power conversion efficiency (PCE) of 18.7% and champion PCE of 20.1% under solar simulation. This study shows that water–perovskite interactions do not necessarily negatively impact the perovskite film preparation process even at the highest efficiencies and that exposure to high contents of water can actually enable humidity tolerance during fabrication in air.

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Compact Layer Free Perovskite Solar Cells with 13.5% Efficiency

Cited by 437 publications

References 49 publications

High Performance Perovskite Solar Cells

High Performance Perovskite Solar Cells

Advances in Perovskite Solar Cells

Aqueous‐Containing Precursor Solutions for Efficient Perovskite Solar Cells

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