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High-efficiency perovskite solar cells based on the black polymorph of HC(NH2)2 PbI3.

High-efficiency perovskite solar cells based on the black polymorph of HC(NH2)2 PbI3.

Advanced materials (Deerfield Beach, Fla.) (2014-06-14)

Jin-Wook Lee, Dong-Jin Seol, An-Na Cho, Nam-Gyu Park

ABSTRACT

Perovskite solar cells with power conversion efficiencies exceeding 16% at AM 1.5 G one sun illumination are developed using the black polymorph of formamidnium lead iodide, HC(NH2)2 PbI3 . Compared with CH3 NH3 PbI3 , HC(NH2 )2 PbI3 extends its absoprtion to 840 nm and shows no phase transition between 296 and 423 K. Moreover, a solar cell based on HC(NH2 )2 PbI3 exhibits photostability and little I-V hysteresis.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

N,N-Dimethylformamide, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.8% (GC)

Sigma-Aldrich

1-Butanol, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.5% (GC)

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1-Butanol, Molecular Biology, ≥99%

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Supelco

Residual Solvent - Acetonitrile(solution in DMSO), Pharmaceutical Secondary Standard; Certified Reference Material

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N,N-Dimethylformamide, biotech. grade, ≥99.9%

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1-Butanol, anhydrous, 99.8%

Supelco

1-Butanol, Pharmaceutical Secondary Standard; Certified Reference Material

Supelco

1-Butanol, analytical standard

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1-Butanol, suitable for HPLC, ≥99.7%

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1-Butanol, 99.9%

Supelco

Dimethylformamide, Pharmaceutical Secondary Standard; Certified Reference Material

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N,N-Dimethylformamide, Molecular Biology, ≥99%

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N,N-Dimethylformamide, suitable for HPLC, ≥99.9%

Sigma-Aldrich

N,N-Dimethylformamide, ACS reagent, ≥99.8%

Supelco

N,N-Dimethylformamide, analytical standard

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Acetonitrile(Neat), Pharmaceutical Secondary Standard; Certified Reference Material

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