Efficient and stable CH3NH3PbI3-sensitized ZnO nanorod array solid-state solar cells

Bi, Dongqin; Boschloo, Gerrit; Schwarzmüller, Stefan; Yang, Lei; Johansson, Erik M. J.; Hagfeldt, Anders

doi:10.1039/c3nr01542d

Cited by 279 publications

(205 citation statements)

References 32 publications

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“…[17][18][19][20][21][22][23][24] Moreover, the conductivity of ZnO is several orders of magnitude higher than the TiO 2 one and that favors the electron transport toward the front contact. 25,26 Kelly et al 21 have recently reported remarkably high efficiency PSCs using a thin layer of dense planar ZnO prepared by spin-coating.…”

Section: 16mentioning

confidence: 99%

Fast and low temperature growth of electron transport layers for efficient perovskite solar cells

et al. 2015

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We describe a fast, simple and low temperature electrochemical technique for the preparation of zinc oxide layers on rigid and flexible substrates. The layers, prepared from a zinc nitrate precursor, are of high structural and optical quality. They have been optimized to be applied as efficient electron transport layers in CH 3 NH 3 PbI 3 -sensitized perovskite solar cells (PSCs). We show that an electrodeposition time of only two minutes and a low processing temperature are sufficient to fabricate solar cells with a power conversion efficiency close to 11%, with a high short circuit current and a small J-V curve hysteresis. The key parameters of the cell functioning have been analyzed over a large applied voltage range by the impedance spectroscopy technique. The solar cell characteristic changes with the ZnO layer deposition time are explained by the variation of the recombination and charge transfer resistances.

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Section: 16mentioning

confidence: 99%

Fast and low temperature growth of electron transport layers for efficient perovskite solar cells

et al. 2015

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“…Another possible explanation would be a reduced electronic coupling of P3HT to CH 3 NH 3 PbI 3 , but it seems to be improbable because Bi et al measured electron lifetime in perovskite/SpiroOMeTAD and perovskite/P3HT systems and attributed the longer electron lifetime in perovskite/Spiro-OMeTAD to worse coupling due to the spiro shape. 28 In conclusion, we have shown that hole transfer from photoexcited CH 3 NH 3 PbI 3 to P3HT occurs on a time scale of a few nanoseconds and from the thermally relaxed perovskite. The rate of hole transfer was found to be independent of excess excitation energy.…”

mentioning

confidence: 99%

Charge Transfer Dynamics from Organometal Halide Perovskite to Polymeric Hole Transport Materials in Hybrid Solar Cells

Brauer

Lee

Nazeeruddin

et al. 2015

J. Phys. Chem. Lett.

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Organometal halide perovskites have emerged as promising next-generation solar cell technologies presenting outstanding efficiencies. However, many questions concerning their working principles remain to be answered. Here, we present a detailed study of hole transfer dynamics into polymeric hole transporting materials (HTMs), poly(triarylamine) (PTAA), poly(3-hexylthiophee-2,5-diyl (P3HT), and poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole) (PCPDTBT). The hole transfer dynamics are shown to occur on a time scale of thousands of picoseconds, being orders of magnitude slower compared to hole transfer involving commonly used Spiro-OMeTAD as HTM.O rganometal halide perovskites have created a surge of attention in the last couple of years due to their impressive performance as absorbers and charge transporters in photovoltaic and photoelectrochemical cells.

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“…Since the¯rst reports, 6,7 the solid state perovskite solar cell has been developed very fast to reach a power conversion e±ciency (PCE) above 15%. 8,9 Several studies have reported on solar cell structure, 7,[10][11][12] alternative organic materials, [13][14][15] charge transport mechanism, [16][17][18] perovskite preparing methods, 8,19,20°e xible solar cell, [21][22][23] and modules. 24 Although perovskite solar cell can also work without hole transport material (HTM), with a PCE of 5-8%, 12,25 transient absorption results show that the most e±cient charge separation is obtained when using TiO 2 and HTM together.…”

Section: Introductionmentioning

confidence: 99%

High-Efficient Solid-State Perovskite Solar Cell Without Lithium Salt in the Hole Transport Material

Boschloo

Hagfeldt

2014

NANO

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CH 3 NH 3 PbX (X¼Br, I, Cl) perovskites have recently been used as light absorbers in hybrid organic-inorganic solid-state solar cells, with e±ciencies above 15%. To date, it is essential to add Lithium bis(Tri°uoromethanesulfonyl)Imide (LiTFSI) to the hole transport materials (HTM) to get a higher conductivity. However, the detrimental e®ect of high LiTFSI concentration on the charge transport, DOS in the conduction band of the TiO 2 substrate and device stability results in an overall compromise for a satisfactory device. Using a higher mobility hole conductor to avoid lithium salt is an interesting alternative. Herein, we successfully made an e±cient perovskite solar cell by applying a hole conductor PTAA (Poly[bis(4-phenyl) (2,4,6-trimethylphenyl)-amine]) in the absence of LiTFSI. Under AM 1.5 illumination of 100 mW/cm 2 , an e±ciency of 10.9% was achieved, which is comparable to the e±ciency of 12.3% with the addition of 1.3 mM LiTFSI. An unsealed device without Li þ shows interestingly a promising stability.

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Efficient and stable CH3NH3PbI3-sensitized ZnO nanorod array solid-state solar cells

Cited by 279 publications

References 32 publications

Fast and low temperature growth of electron transport layers for efficient perovskite solar cells

Fast and low temperature growth of electron transport layers for efficient perovskite solar cells

Charge Transfer Dynamics from Organometal Halide Perovskite to Polymeric Hole Transport Materials in Hybrid Solar Cells

High-Efficient Solid-State Perovskite Solar Cell Without Lithium Salt in the Hole Transport Material

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