Highly enhanced long time stability of perovskite solar cells by involving a hydrophobic hole modification layer

Chen, Cong; Li, Hao; Jin, Junjie; Cheng, Yu; Liu, Dali; Song, Hongwei; Dai, Qilin

doi:10.1016/j.nanoen.2016.12.009

Cited by 68 publications

(71 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One deep trap state of 109 meV is consistent with that in the control device, and another shallow state (63 meV) is attributed to the photon energy conversion mechanism from UV to visible light by SAED. [5,27] The corresponding trap state is fitted to be 77 meV for the control device with a UV filter, which is similar to the SAED-modified device (63 meV) in Figure 3d.…”

Section: Resultssupporting

confidence: 53%

“…According to the fluorescence mechanism of SAED, shown in the inset of Figure 1d, which is commonly accepted by researchers, electrons from the 4f 7 ground state are pumped to the 4f 6 5d 1 energy level of Eu 2+ , followed by electron capture by a valence band reducing Eu 2+ to Eu + with a broad emission spectrum. [27] J-V curves of two optimized cells with and without SAED are shown in Figure 2a. Furthermore, Dy 3+ ions, as hole traps, play an important role in the long afterglow process of SAED.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Long‐Lasting Nanophosphors Applied to UV‐Resistant and Energy Storage Perovskite Solar Cells

Chen

Jin

et al. 2017

Advanced Energy Materials

Self Cite

127

118

View full text Add to dashboard Cite

Recently, considerable progress is achieved in lab prototype perovskite solar cells (PSCs); however, the stability of outdoor applications of PSCs remains a challenge due to the high sensitivity of perovskite material under moist and ultraviolet (UV) light conditions. In this work, the UV photostability of PSC devices is improved by incorporating a photon downshifting layer—SrAl2O4: Eu2+, Dy3+ (SAED)—prepared using the pulsed laser deposition approach. Light‐induced deep trap states in the photoactive layer are depressed, and UV light‐induced device degradation is inhibited after the SAED modification. Optimized power conversion efficiency (PCE) of 17.8% is obtained through the enhanced light harvesting and reduced carrier recombination provided by SAED. More importantly, a solar energy storage effect due to the long‐persistent luminescence of SAED is obtained after light illumination is turned off. The introduction of downconverting material with long‐persistent luminescence in PSCs not only represents a new strategy to improve PCE and light stability by photoconversion from UV to visible light but also provides a new paradigm for solar energy storage.

show abstract

Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Long‐Lasting Nanophosphors Applied to UV‐Resistant and Energy Storage Perovskite Solar Cells

Chen

Jin

et al. 2017

Advanced Energy Materials

Self Cite

127

118

View full text Add to dashboard Cite

show abstract

“…High magnification SEM images of the control and MB 1.5 films are shown in Figure S5 (Supporting Information). [22,32] The enhanced J sc and photoelectric response can be confirmed in incident phototo-current conversion efficiency (IPCE) spectra in Figure 2b, which exhibits that the modified device shows higher intensity in the entire wavelength range than the control device, leading to higher photocurrent. On the contrary, the modified film has www.advenergymat.de www.advancedsciencenews.com a very clear grain boundary and even surface ( Figure S5b, Supporting Information).…”

Section: Resultsmentioning

confidence: 78%

Carrier Interfacial Engineering by Bismuth Modification for Efficient and Thermoresistant Perovskite Solar Cells

Chen

Liu

Zhang

et al. 2018

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

Organic–inorganic halide perovskite solar cells (PSCs) have emerged as attractive alternatives to conventional solar cells. It is still a challenge to obtain PSCs with good thermal stability and high permanence, especially at extreme outdoor temperatures. This work systematically studies the effects of Bi3+ modification on structural, electrical, and optical properties of perovskite films (FA0.83MA0.17Pb(I0.83Br0.17)3) and the performance of corresponding PSCs. The results indicate that Bi3+ modified PSCs can achieve better thermal stability, photovoltaic response, and reproducibility compared with control cells due to the decreased grain boundaries, enhanced crystallization, and improved electron extraction from perovskite film. As a result, the modified PSC exhibits an optimized power conversion efficiency (PCE) of 19.4% compared with 18.3% for the optimized control device, accompanied by better thermoresistant ability under 100–180 °C and enhanced long‐term stability. The degradation rate of the modified device is reduced by an order of magnitude due to effective structural defect modification in perovskite photoactive layer. It could maintain more than two months at 60 °C. These results shed light on the origin of crystallization and thermal stability of perovskite films, and provide an approach to solve thermal stability issue of PSCs.

show abstract

“…Finally,weperform the normalized performances of the solar cell upon persistent attack by flowing water-vapor (80 %RH, 25 8 8C) without encapsulation. [31,32] All of these results are highly encouraging to the perspective of tailored carbon-electrode all-inorganic PSCs in high-humidity conditions. [31,32] All of these results are highly encouraging to the perspective of tailored carbon-electrode all-inorganic PSCs in high-humidity conditions.…”

Section: Angewandte Chemiementioning

confidence: 64%

Carbon‐Electrode‐Tailored All‐Inorganic Perovskite Solar Cells To Harvest Solar and Water‐Vapor Energy

Duan

Zhao

et al. 2018

Angewandte Chemie

View full text Add to dashboard Cite

Moisture is the worst enemy for state-of-the-art perovskite solar cells (PSCs). However,t he flowing water vapor within nanoporous carbonaceous materials can create potentials.Therefore,itisachallenge to integrate water vapor and solar energies into as ingle PSC device.W ed emonstrate herein all-inorganic cesium lead bromide (CsPbBr 3 )solar cells tailored with carbon electrodes to simultaneously harvest solar and water-vapor energy.U pon interfacial modification and plasma treatment, the bifunctional PSCs yield am aximum power conversion efficiency up to 9.43 %u nder one sun irradiation according to photoelectric conversion principle and apower output of 0.158 mWwith voltage of 0.35 Vand current of 0.45 mAi n8 0% relative humidity through the flowing potentials at the carbon/water interface.The initial efficiency is only reduced by 2% on exposing the inorganic PSC with 80 % humidity over 40 days.T he successful realization of physical proof-of-concept multi-energy integrated solar cells provides new opportunities of maximizing overall power output.

show abstract

Highly enhanced long time stability of perovskite solar cells by involving a hydrophobic hole modification layer

Cited by 68 publications

References 45 publications

Long‐Lasting Nanophosphors Applied to UV‐Resistant and Energy Storage Perovskite Solar Cells

Long‐Lasting Nanophosphors Applied to UV‐Resistant and Energy Storage Perovskite Solar Cells

Carrier Interfacial Engineering by Bismuth Modification for Efficient and Thermoresistant Perovskite Solar Cells

Carbon‐Electrode‐Tailored All‐Inorganic Perovskite Solar Cells To Harvest Solar and Water‐Vapor Energy

Contact Info

Product

Resources

About