Efficient hole-blocking layer-free planar halide perovskite thin-film solar cells

Ke, Weijun; Fang, Guojia; Wan, Jiawei; Tao, Hong; Liu, Qin; Xiong, Lixia; Qin, Pingli; Wang, Jing; Lei, Hongwei; Yang, Guang; Qin, Minchao; Zhao, Xingzhong; Yan, Yanfa

doi:10.1038/ncomms7700

Cited by 375 publications

(302 citation statements)

References 48 publications

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“…The inset of Fig. 3a presents the Ohmic contact curve between the hole transporting layer and gold electrode, which indicates that Au is a good choice as the top electrode, which is consistent with a previous report [23].…”

Section: Characterizationsupporting

confidence: 77%

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High-performance ultraviolet-visible tunable perovskite photodetector based on solar cell structure

Xue

Zhou

et al. 2017

Sci. China Mater.

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An ultraviolet (UV)-visible tunable photodetector based on ZnO nanorod arrays (NAs)/perovskite heterojunction solar cell structures is presented, in which the ZnO NAs are prepared using the hydrothermal method and annealed in different atmospheres. Based on solar cell structure perovskite photodetectors, it exhibited highly repeatable and stable photoelectric response characteristics. In addition, the devices with ZnO NAs annealed in a vacuum showed a high responsivity of about 10 14 cm Hz 1/2 W −1 in the visible region, whereas the devices with ZnO NAs annealed in air exhibited good detectivity in the UV region, especially at around 350 nm. Furthermore, when the annealing atmosphere of the ZnO nanorods was changed from vacuum to air, the dominant detection region of the photodetectors was altered from the visible to the ultraviolet region. These results enable potential applications of the ZnO NAs/perovskite photodetectors in ultraviolet and visible regions.

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Section: Characterizationsupporting

confidence: 77%

“…Perovskite solar cells are not only used as energy conversion devices but can also act as photodetectors [18][19][20][21][22][23][24]. In reports by Lin et al [18], their photodetectors possessed a high detectivity beyond 10 12 Jones and a PCE of more than 12%.…”

Section: Introductionmentioning

confidence: 99%

High-performance ultraviolet-visible tunable perovskite photodetector based on solar cell structure

Xue

Zhou

et al. 2017

Sci. China Mater.

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“…[ 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. Some "ETL-free" cells exhibited very low stabilized power output even though decent PCEs were obtained from J-V measurements.…”

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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“…The dark J-V curves indicate that the device with 2000 rpm TiO 2 layer exhibits a better diode behaviour than the samples with other two kinds of TiO 2 layers. The direct contacts between CH 3 NH 3 PbI 3-X Cl X layer and FTO may be responsible for the poor rectification ability of the TiO 2 -1000 and TiO 2 -3000 cells [5].…”

Section: Effect Of the Different Spin Coating Speeds On Thementioning

confidence: 99%

“…Perovskite solar cells (PSCs) have developed a variety of device structures, since the first report from Kojima et al in 2009 [1], such as mesoporous, meso-superstructure, planar heterojunction, and hole-blocking layer-free structure [2][3][4][5]. The planar heterojunction is considered to be the most competitive construction on account of their simplified fabricating procedure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing Process on CH₃NH₃PbI_3-XCl_X Film Morphology of Planar Heterojunction Perovskite Solar Cells with Optimal Compact TiO₂ Layer

Chen

Zou

Yang

et al. 2017

International Journal of Photoenergy

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The morphology of compact TiO 2 film used as an electron-selective layer and perovskite film used as a light absorption layer in planar perovskite solar cells has a significant influence on the photovoltaic performance of the devices. In this paper, the spin coating speed of the compact TiO 2 is investigated in order to get a high-quality film and the compact TiO 2 film exhibits pinhole-and crack-free films treated by 2000 rpm for 60 s. Furthermore, the effect of annealing process, including annealing temperature and annealing program, on CH 3 NH 3 PbI 3-X Cl X film morphology is studied. At the optimal annealing temperature of 100°C, the CH 3 NH 3 PbI 3-X Cl X morphology fabricated by multistep slow annealing method has smaller grain boundaries and holes than that prepared by one-step direct annealing method, which results in the reduction of grain boundary recombination and the increase of Voc. With all optimal procedures, a planar fluorine-doped tin oxide (FTO) substrate/compact TiO 2 / CH 3 NH 3 PbI 3-X Cl X /Spiro-MeOTAD/Au cell is prepared for an active area of 0.1 cm 2 . It has achieved a power conversion efficiency (PCE) of 14.64%, which is 80.3% higher than the reference cell (8.12% PCE) without optimal perovskite layer. We anticipate that the annealing process with optimal compact TiO 2 layer would possibly become a promising method for future industrialization of planar perovskite solar cells.

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Efficient hole-blocking layer-free planar halide perovskite thin-film solar cells

Cited by 375 publications

References 48 publications

High-performance ultraviolet-visible tunable perovskite photodetector based on solar cell structure

High-performance ultraviolet-visible tunable perovskite photodetector based on solar cell structure

Advances in Perovskite Solar Cells

Effect of Annealing Process on CH₃NH₃PbI_3-XCl_X Film Morphology of Planar Heterojunction Perovskite Solar Cells with Optimal Compact TiO₂ Layer

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Efficient hole-blocking layer-free planar halide perovskite thin-film solar cells

Cited by 375 publications

References 48 publications

High-performance ultraviolet-visible tunable perovskite photodetector based on solar cell structure

High-performance ultraviolet-visible tunable perovskite photodetector based on solar cell structure

Advances in Perovskite Solar Cells

Effect of Annealing Process on CH3NH3PbI3-XClX Film Morphology of Planar Heterojunction Perovskite Solar Cells with Optimal Compact TiO2 Layer

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Effect of Annealing Process on CH₃NH₃PbI_3-XCl_X Film Morphology of Planar Heterojunction Perovskite Solar Cells with Optimal Compact TiO₂ Layer