Lead halide perovskite owns charge diffusion length in micrometer range,which makes the planar-structure solar cells possible.The simple and lowtemperature process of planar devices makes it very promising.The power c...Lead halide perovskite owns charge diffusion length in micrometer range,which makes the planar-structure solar cells possible.The simple and lowtemperature process of planar devices makes it very promising.The power conversion efficiency of planar perovskite solar cells has increased from 1.8%to 23.7%in past several years,which can compete with the mesoporous structure counterpart.In this minireview,recent progress in high-efficiency planar perovskite solar cells will be summarized.展开更多
Although perovskite solar cells containing methylamine cation can show high power conversion efficiency,stability is a concern.Here,methylamine-free perovskite material Csx FA1–x PbI3 was synthesized by a one-step me...Although perovskite solar cells containing methylamine cation can show high power conversion efficiency,stability is a concern.Here,methylamine-free perovskite material Csx FA1–x PbI3 was synthesized by a one-step method.In addition,we incorporated smaller cadmium ions into mixed perovskite lattice to partially replace Pb ions to address the excessive internal strain in perovskite structure.We have found that the introduction of Cd can improve the crystallinity and the charge carrier lifetime of perovskite films.Consequently,a power conversion efficiency as high as 20.59%was achieved.More importantly,the devices retained 94%of their initial efficiency under 1200 h of continuous illumination.展开更多
Inorganic perovskite cesium lead halide is extensively studied because of its potential in improving the thermal stability of perovskite materials. However, the tolerance factor of this type of perovskite is near the ...Inorganic perovskite cesium lead halide is extensively studied because of its potential in improving the thermal stability of perovskite materials. However, the tolerance factor of this type of perovskite is near the critical value, which leads to phase instability. The optoelectronic active black phases(α,β, and γ phases of CsPbI3) are metastable at room temperature, which can be easily transferred into an optoelectronic inactive yellow phase(δ-CsPbI3). This review highlights recent progress in stabilizing the black phase for efficient and stable perovskite solar cells.展开更多
Cesium-based inorganic perovskite solar cells(PSCs)are paid more attention because of their potential thermal stability.However,prevalent salt-doped 2,2',7,7'-tetrakis(N,N-dipmethoxyphenylamine)9,9z-spirobiflu...Cesium-based inorganic perovskite solar cells(PSCs)are paid more attention because of their potential thermal stability.However,prevalent salt-doped 2,2',7,7'-tetrakis(N,N-dipmethoxyphenylamine)9,9z-spirobifluorene(Spiro-OMeTAD)as hole-transport materials(HTMs)for a high-efficiency inorganic device has an unfortunate defective thermal stability.In this study,we apply poly(3-hexylthiophene-2,5-diyl)(P3HT)as the HTM and design all-inorganic PSCs with an indium tin oxide(ITO)/SnO2/LiF/CsPbI3-xBrx/P3HT/Au structure.As a result,the CsPbb-xBrx PSCs achieve an excellent performance of 15.84%.The P3HT HTM-based device exhibits good photo-stability,maintaining〜80%of their initial power conversion efficiency over 280 h under one Sun irradiation.In addition,they also show better thermal stability compared with the traditional HTM Spiro-OMeTAD.展开更多
文摘Lead halide perovskite owns charge diffusion length in micrometer range,which makes the planar-structure solar cells possible.The simple and lowtemperature process of planar devices makes it very promising.The power conversion efficiency of planar perovskite solar cells has increased from 1.8%to 23.7%in past several years,which can compete with the mesoporous structure counterpart.In this minireview,recent progress in high-efficiency planar perovskite solar cells will be summarized.
基金supported by National Natural Science Foundation of China (Grant Numbers : 61634001, 61574133)
文摘Although perovskite solar cells containing methylamine cation can show high power conversion efficiency,stability is a concern.Here,methylamine-free perovskite material Csx FA1–x PbI3 was synthesized by a one-step method.In addition,we incorporated smaller cadmium ions into mixed perovskite lattice to partially replace Pb ions to address the excessive internal strain in perovskite structure.We have found that the introduction of Cd can improve the crystallinity and the charge carrier lifetime of perovskite films.Consequently,a power conversion efficiency as high as 20.59%was achieved.More importantly,the devices retained 94%of their initial efficiency under 1200 h of continuous illumination.
基金supported by the National Key Research and Development Program of China (2016YFB0700700, 2017YFA0206600)Beijing Municipal Science & Technology Commission (Z181100004718005, Z181100005118002)+1 种基金the National Natural Science Foundation of China (61574133, 61634001)the National 1000 Young Talents Awards
文摘Inorganic perovskite cesium lead halide is extensively studied because of its potential in improving the thermal stability of perovskite materials. However, the tolerance factor of this type of perovskite is near the critical value, which leads to phase instability. The optoelectronic active black phases(α,β, and γ phases of CsPbI3) are metastable at room temperature, which can be easily transferred into an optoelectronic inactive yellow phase(δ-CsPbI3). This review highlights recent progress in stabilizing the black phase for efficient and stable perovskite solar cells.
基金supported by the Beijing Municipal Science and Technology Commission(Nos.Z181100004718005 and Z181100005118002).
文摘Cesium-based inorganic perovskite solar cells(PSCs)are paid more attention because of their potential thermal stability.However,prevalent salt-doped 2,2',7,7'-tetrakis(N,N-dipmethoxyphenylamine)9,9z-spirobifluorene(Spiro-OMeTAD)as hole-transport materials(HTMs)for a high-efficiency inorganic device has an unfortunate defective thermal stability.In this study,we apply poly(3-hexylthiophene-2,5-diyl)(P3HT)as the HTM and design all-inorganic PSCs with an indium tin oxide(ITO)/SnO2/LiF/CsPbI3-xBrx/P3HT/Au structure.As a result,the CsPbb-xBrx PSCs achieve an excellent performance of 15.84%.The P3HT HTM-based device exhibits good photo-stability,maintaining〜80%of their initial power conversion efficiency over 280 h under one Sun irradiation.In addition,they also show better thermal stability compared with the traditional HTM Spiro-OMeTAD.
