Energetically favored formation of SnO2 nanocrystals as electron transfer layer in perovskite solar cells with high efficiency exceeding 19%

Dong, Qingshun; Shi, Yantao; Zhang, Chunyang; Wu, Yukun; Wang, Liduo

doi:10.1016/j.nanoen.2017.08.041

Cited by 170 publications

(140 citation statements)

References 42 publications

Supporting

Mentioning

137

Contrasting

Order By: Relevance

“…As shown in Fig. 4b, the bandgap of the doped SnO 2 calculated from the derived Kubelka-Munk spectra was 4.13 eV, as same as the pristine SnO 2 film, which was in accordance with the previous report [27]. The low-level Nb doping process illustrated unchanged bandgap in comparison with the pristine SnO 2 film.…”

Section: Resultssupporting

confidence: 88%

“…S1), very close to the results of our previous work [27]. The Nb-doping of SnO 2 was performed by simply adding niobium ethoxide into the SnO 2 collosol, as described in the experimental section.…”

Section: Resultssupporting

confidence: 77%

“…Most reported solution processes for SnO 2 preparation employed organic sols [22,23], purchased nanoparticles dilutions [24], or SnCl 4 /SnCl 2 ·2H 2 O precursors [20,25,26], which were operated under 150°C-200°C. In our recent work, we explored a sol-gel route for fabricating crystallized SnO 2 ETL below 80°C, which significantly advanced the low temperature fabrication of PSCs and the development of flexible photovoltaic devices [27]. Elemental doping in semiconducting metal oxide was found to efficiently improve the electronic properties [28], reduce the trap-state density [29], as well as modify the CB position [30,31].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells

Liu

Dong

et al. 2018

Sci. China Mater.

Self Cite

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells

Liu

Dong

et al. 2018

Sci. China Mater.

Self Cite

View full text Add to dashboard Cite

“…The solar cell is kept at an elevated temperature of 75 °C, which simulates an operation of the device under a more extreme stress condition, a solar cell has to withstand-at least as peak condition. [22,[72][73][74][75] It was shwon before that UV radiation degrades perovskite solar cells at the front side interface of the metal oxide charge transport material and the perovskite absorber layer. More important, the output voltage is not altered significantly while tracking, demonstrating a stable position of the MPP and less influence of the small hysteresis present in the devices.…”

Section: Robustness Of Nickel Oxide-based Solar Cells Under External mentioning

confidence: 99%

“…More important, the output voltage is not altered significantly while tracking, demonstrating a stable position of the MPP and less influence of the small hysteresis present in the devices. [22,74,75] Titanium dioxide (TiO x ), in particular, exhibits strong UV degradation and is usually not recommended to be placed in front of the perovskite absorber without UV blocking layers. [21][22][23] Taking this into account, electron beam evaporated NiO x as an HTL is improving the device robustness against temperature stress, which is usually the only stress factor that is not limited during outdoor operation but a common problem for devices employing organic HTLs like spiro-MeOTAD or PTAA.…”

Section: Robustness Of Nickel Oxide-based Solar Cells Under External mentioning

confidence: 99%

Electron‐Beam‐Evaporated Nickel Oxide Hole Transport Layers for Perovskite‐Based Photovoltaics

Abzieher

Moghadamzadeh

Schackmar

et al. 2019

Advanced Energy Materials

148

149

View full text Add to dashboard Cite

application-oriented research like process engineering and upscaling is observed. [1][2][3][4][5] Even though other optoelectronic devices like light emitting diodes and lasers are being researched, [6][7][8][9][10][11][12][13] perovskite-based photovoltaics (PV) is the key technology driving the fast emergence of perovskitebased optoelectronics. Recently, power conversion efficiencies (PCEs) close to 24% were demonstrated for perovskite PV, exceeding the PCEs of established thinfilm technologies. [14] Despite the rapid progress in terms of PCE, one key challenge of perovskite-based PV is still its low stability under realistic outdoor stress conditions-temperature, humidity, and ultraviolet (UV) radiation. A significant advance toward more stable devices was demonstrated by engineering the composition of the large cation site of the perovskite crystal structure and by including low-dimensional perovskite interlayers and passivation layers. [15][16][17][18][19][20] Further advances in stability are based on the charge extracting materials and their interfaces with the perovskite absorber layers. [21][22][23] Most reported record PCEs are still based on highly expensive organic hole transport layer (HTL) materials like 2,2′,7,7′-tetrakis[N,N-di (4methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-MeOTAD) or poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA). [20,24,25] Although these materials result in good performance on short High-quality charge carrier transport materials are of key importance for stable and efficient perovskite-based photovoltaics. This work reports on electron-beam-evaporated nickel oxide (NiO x ) layers, resulting in stable power conversion efficiencies (PCEs) of up to 18.5% when integrated into solar cells employing inkjet-printed perovskite absorbers. By adding oxygen as a process gas and optimizing the layer thickness, transparent and efficient NiOx hole transport layers (HTLs) are fabricated, exhibiting an average absorptance of only 1%. The versatility of the material is demonstrated for different absorber compositions and deposition techniques. As another highlight of this work, all-evaporated perovskite solar cells employing an inorganic NiO x HTL are presented, achieving stable PCEs of up to 15.4%. Along with good PCEs, devices with electron-beam-evaporated NiO x show improved stability under realistic operating conditions with negligible degradation after 40 h of maximum power point tracking at 75 °C. Additionally, a strong improvement in device stability under ultraviolet radiation is found if compared to conventional perovskite solar cell architectures employing other metal oxide charge transport layers (e.g., titanium dioxide). Finally, an all-evaporated perovskite solar mini-module with a NiO x HTL is presented, reaching a PCE of 12.4% on an active device area of 2.3 cm 2 .

show abstract

Review on the Application of SnO₂ in Perovskite Solar Cells

Xiong

Guo

Wen

et al. 2018

Adv Funct Materials

530

335

View full text Add to dashboard Cite

SnO 2 has been well investigated in many successful state-of-the-art perovskite solar cells (PSCs) due to its favorable attributes such as high mobility, wide bandgap, and deep conduction band and valence band. Several independent studies show the performances of PSCs with SnO 2 are higher than that with TiO 2 , especially in device stability. In 2015, the first planar PSCs were reported with a power conversion efficiency over 17% using a low temperature sol-derived SnO 2 nanocrystal electron transport layer (ETL). Since then, many other groups have also reported high performance PSCs based on SnO 2 ETLs. SnO 2 planar PSCs show currently the highest performance in planar configuration devices (21.6%) and are close to the record holder of TiO 2 mesoporous PSCs, suggesting their high potential as ETLs in PSCs. The main concerns with the application of SnO 2 as ETL are that it suffers from degradation in high temperature processes and that its much lower conduction band compared to perovskite may result in a voltage loss of PSCs. Here, notable achievements to date are outlined, the unique attributes of SnO 2 as ETLs in PSCs are described, and the challenges facing the successful development of PSCs and approaches to the problems are discussed.

show abstract

Energetically favored formation of SnO2 nanocrystals as electron transfer layer in perovskite solar cells with high efficiency exceeding 19%

Cited by 170 publications

References 42 publications

Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells

Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells

Electron‐Beam‐Evaporated Nickel Oxide Hole Transport Layers for Perovskite‐Based Photovoltaics

Review on the Application of SnO₂ in Perovskite Solar Cells

Contact Info

Product

Resources

About

Energetically favored formation of SnO2 nanocrystals as electron transfer layer in perovskite solar cells with high efficiency exceeding 19%

Cited by 170 publications

References 42 publications

Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells

Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells

Electron‐Beam‐Evaporated Nickel Oxide Hole Transport Layers for Perovskite‐Based Photovoltaics

Review on the Application of SnO2 in Perovskite Solar Cells

Contact Info

Product

Resources

About

Review on the Application of SnO₂ in Perovskite Solar Cells