Stacking n-type layers: Effective route towards stable, efficient and hysteresis-free planar perovskite solar cells

Liu, Xueping; Bu, Tongle; Li, Jing; He, Jian‐Jun; Li, Tianhui; Zhang, Jun; Li, Wangnan; Ku, Zhiliang; Peng, Yong; Huang, Fuzhi; Cheng, Yi‐Bing; Zhong, Jie

doi:10.1016/j.nanoen.2017.11.069

Cited by 57 publications

(48 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bilayer gives a large ΔG (free energy difference) value as well as a defect‐free physical contact, which can enhance electron extraction, resulting better device performance of 21.1% in reverse scan with high V oc of 1.2 V. Compared with single SnO 2 layer or single a‐TiO 2 layer, it showed better stable‐output and hysteresis phenomenon (Figure b,c) . Zhong and co‐workers also formed a stacked layer of TiO 2 (spray pyrolytic method)/SnO 2 (spin‐coating SnO 2 colloidal solution) on FTO substrate as n‐type layer to reduce pinholes and help hole blocking between perovskite layer and substrate, and they got PCE of 18.03%.…”

Section: Modification Of Sno2mentioning

confidence: 99%

“…Caruso and co‐workers also showed that the SnO 2 nanosheet ETL combined with C 60 showed better storage device stability in ambient conditions compared with the TiO 2 nanosheet . Zhong and co‐workers used TiO 2 /SnO 2 bilayer as ETL and the devices exhibit good long‐term storage stability and even in harsh environment it showed much better performance than the single ETL layer …”

Section: Hysteresis and Stabilitymentioning

confidence: 99%

See 1 more Smart Citation

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

Jiang

Zhang

You

2018

Small

728

504

View full text Add to dashboard Cite

The highest power conversion efficiency of perovskite solar cells is beyond 22%. Charge transport layers are found to be critical for device performance and stability. A traditional electron transport layer (ETL), such as TiO , is not very efficient for charge extraction at the interface, especially in planar structure. In addition, the devices using TiO suffer from serious degradation under ultraviolet illumination. SnO owns a better band alignment with the perovskite absorption layer and high electron mobility, which is helpful for electron extraction. In this Review, recent progresses in efficient and stable perovskite solar cells using SnO as ETL are summarized.

show abstract

Section: Modification Of Sno2mentioning

confidence: 99%

Section: Hysteresis and Stabilitymentioning

confidence: 99%

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

Jiang

Zhang

You

2018

Small

728

504

View full text Add to dashboard Cite

show abstract

“…[22,27] Consequently, SnO 2 is an ideal candidate to address this issue because of its larger bandgap. [22,27] Consequently, SnO 2 is an ideal candidate to address this issue because of its larger bandgap.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the device based on SnO 2 fabricated by spin-coating is not reproducible. [27] In fact, these studies are not comprehensive and there are a lot of significant issues on double-layer architecture such as interface and stability, which need to be addressed. Based on SnO 2 (fabricated using nanocrystal or solution)/TiO 2 ETL some groups reported PCE over 20%.…”

Section: Introductionmentioning

confidence: 99%

Surface Engineering of TiO₂ ETL for Highly Efficient and Hysteresis‐Less Planar Perovskite Solar Cell (21.4%) with Enhanced Open‐Circuit Voltage and Stability

Tavakoli

Yadav

Tavakoli

et al. 2018

Advanced Energy Materials

276

189

View full text Add to dashboard Cite

Interfacial studies and band alignment engineering on the electron transport layer (ETL) play a key role for fabrication of high‐performance perovskite solar cells (PSCs). Here, an amorphous layer of SnO2 (a‐SnO2) between the TiO2 ETL and the perovskite absorber is inserted and the charge transport properties of the device are studied. The double‐layer structure of TiO2 compact layer (c‐TiO2) and a‐SnO2 ETL leads to modification of interface energetics, resulting in improved charge collection and decreased carrier recombination in PSCs. The optimized device based on a‐SnO2/c‐TiO2 ETL shows a maximum power conversion efficiency (PCE) of 21.4% as compared to 19.33% for c‐TiO2 based device. Moreover, the modified device demonstrates a maximum open‐circuit voltage (Voc) of 1.223 V with 387 mV loss in potential, which is among the highest reported value for PSCs with negligible hysteresis. The stability results show that the device on c‐TiO2/a‐SnO2 retains about 91% of its initial PCE value after 500 h light illumination, which is higher than pure c‐TiO2 (67%) based devices. Interestingly, using a‐SnO2/c‐TiO2 ETL the PCE loss was only 10% of initial value under continuous UV light illumination after 30 h, which is higher than that of c‐TiO2 based device (28% PCE loss).

show abstract

“…[1][2][3] Owing to its simple structure and fabrication process, planar PSCs are more feasiblef or commercialization. [6][7][8][9][10][11] Especially SnO 2 has exhibited great potential because of its low cost, easy scale-up syntheses and ultraviolet (UV) light resistance. [6][7][8][9][10][11] Especially SnO 2 has exhibited great potential because of its low cost, easy scale-up syntheses and ultraviolet (UV) light resistance.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Crystallinity of Low‐Temperature Solution‐Processed SnO₂ for Highly Reproducible Planar Perovskite Solar Cells

Liu

et al. 2018

ChemSusChem

Self Cite

View full text Add to dashboard Cite

Low-temperature solution-processed SnO as a promising electron-transport material for planar perovskite solar cells (PSCs) has attracted particular attention because of its outstanding properties such as high optical transparency or high electron mobility. However, low-temperature sol-gel processes used in the synthesis are inevitably affected by the humidity of the atmosphere, which results in a wide distribution in the performance of the prepared PSCs owing to the inability to control crystallinity and defects. Herein, a highly crystalline SnO film is synthesized using a simple water bath post-treatment, which can remove the surface residuals of SnCl on the SnO films, which is beneficial for the interface charge transport from the perovskite to the SnO electron-transport layer. An improved performance of the PSCs can be easily obtained applying this treatment, giving rise to a high power conversion efficiency (PCE) of 19.17 %, much higher than that of the pristine SnO -based device (17.59 %). Most importantly, the reproducibility of the devices has been greatly improved, independent of the environmental humidity. Therefore, the enhanced crystallinity of SnO has shown promise for future commercial PSC applications: 5 cm×5 cm PSC modules have achieved a PCE of 16.16 %.

show abstract

Stacking n-type layers: Effective route towards stable, efficient and hysteresis-free planar perovskite solar cells

Cited by 57 publications

References 47 publications

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

Surface Engineering of TiO₂ ETL for Highly Efficient and Hysteresis‐Less Planar Perovskite Solar Cell (21.4%) with Enhanced Open‐Circuit Voltage and Stability

Enhanced Crystallinity of Low‐Temperature Solution‐Processed SnO₂ for Highly Reproducible Planar Perovskite Solar Cells

Contact Info

Product

Resources

About

Stacking n-type layers: Effective route towards stable, efficient and hysteresis-free planar perovskite solar cells

Cited by 57 publications

References 47 publications

SnO2: A Wonderful Electron Transport Layer for Perovskite Solar Cells

SnO2: A Wonderful Electron Transport Layer for Perovskite Solar Cells

Surface Engineering of TiO2 ETL for Highly Efficient and Hysteresis‐Less Planar Perovskite Solar Cell (21.4%) with Enhanced Open‐Circuit Voltage and Stability

Enhanced Crystallinity of Low‐Temperature Solution‐Processed SnO2 for Highly Reproducible Planar Perovskite Solar Cells

Contact Info

Product

Resources

About

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

SnO₂: A Wonderful Electron Transport Layer for Perovskite Solar Cells

Surface Engineering of TiO₂ ETL for Highly Efficient and Hysteresis‐Less Planar Perovskite Solar Cell (21.4%) with Enhanced Open‐Circuit Voltage and Stability

Enhanced Crystallinity of Low‐Temperature Solution‐Processed SnO₂ for Highly Reproducible Planar Perovskite Solar Cells