Low-temperature processed solar cells with formamidinium tin halide perovskite/fullerene heterojunctions

Zhang, Meng; Lyu, Miaoqiang; Yun, Jung‐Ho; Noori, Mahir; Zhou, Xiaojing; Cooling, Nathan A.; Wang, Qiong; Yu, Hua; Dastoor, Paul C.; Wang, Luyao

doi:10.1007/s12274-016-1051-8

Cited by 92 publications

(75 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accord-5 ing to the cross-sectional SEM image of the device (Figure S12), the thicknesses of the perovskite, NiO x , and PCBM layers are approximately 200 nm, 50 nm, and 100 nm, respectively. The high FF value can be ascribed to suppressed defect-mediated carrier recombination, as well as balanced carrier transport [43][44][45][46] . High density of pinholes were found in the films with too much or too little SnF 2 .…”

Section: Resultsmentioning

confidence: 99%

Highly Oriented Low-Dimensional Tin Halide Perovskites with Enhanced Stability and Photovoltaic Performance

et al. 2017

View full text Add to dashboard Cite

The low toxicity and a near-ideal choice of bandgap make tin perovskite an attractive alternative to lead perovskite in low cost solar cells. However, the development of Sn perovskite solar cells has been impeded by their extremely poor stability when exposed to oxygen. We report low-dimensional Sn perovskites that exhibit markedly enhanced air stability in comparison with their 3D counterparts. The reduced degradation under air exposure is attributed to the improved thermodynamic stability after dimensional reduction, the encapsulating organic ligands, and the compact perovskite film preventing oxygen ingress. We then explore these highly oriented low-dimensional Sn perovskite films in solar cells. The perpendicular growth of the perovskite domains between electrodes allows efficient charge carrier transport, leading to power conversion efficiencies of 5.94% without the requirement of further device structure engineering. We tracked the performance of unencapsulated devices over 100 h and found no appreciable decay in efficiency. These findings raise the prospects of pure Sn perovskites for solar cells application.

show abstract

Section: Resultsmentioning

confidence: 99%

Highly Oriented Low-Dimensional Tin Halide Perovskites with Enhanced Stability and Photovoltaic Performance

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Although, the device PCE did not exceed 1.7%, the as‐deposited MASnI 3 thin films yielded an effectively controlled stoichiometry with improved morphological and electronic properties without the use of SnF 2 additive. Notably the inverted device structure such as in Figure c, has proven to be the most favorable for PV response in Sn halide perovskites . Although inferior performances have been obtained for Sn halide perovskite based solar cells relative to their Pb halide perovskite based counterparts, careful control of film deposition conditions coupled with the adoption of inverted device architecture can help create high quality films with reduced charge recombination and negligible hysteresis as shown in Figure c.…”

Section: Preparation Methods Of Sn Halide Perovskite Filmsmentioning

confidence: 99%

Tin Halide Perovskites: Progress and Challenges

Yang

Igbari

Lou

et al. 2019

Advanced Energy Materials

141

116

View full text Add to dashboard Cite

The chemical composition engineering of lead halide perovskites via a partial or complete replacement of toxic Pb with tin has been widely reported as a feasible process due to the suitable ionic radius of Sn and its possibility of existing in the +2 state. Interestingly, a complete replacement narrows the bandgap while a partial replacement gives an anomalous phenomenon involving a further narrowing of bandgap relative to the pure Pb and Sn halide perovskite compounds. Unfortunately, the merits of this anomalous behavior have not been properly harnessed. Although promising progress has been made to advance the properties and performance of Sn‐based perovskite systems, their photovoltaic (PV) parameters are still significantly inferior to those of the Pb‐based analogs. This review summarizes the current progress and challenges in the preparation, morphological and photophysical properties of Sn‐based halide perovskites, and how these affect their PV performance. Although it can be argued that the Pb halide perovskite systems may remain the most sought after technology in the field of thin film perovskite PV, prospective research directions are suggested to advance the properties of Sn halide perovskite materials for improved device performance.

show abstract

“…Tin‐based lead‐free perovskites are considered unsuitable for planar heterojunction solar cells due to their short diffusion lengths, a SPCE of 1.72% is shown by FASnI 2 Br films as a light absorber with C 60 as ETM suggesting the significance of perovskite film morphology on the device performance. FASnI 2 Br films with an architecture ITO/PEDOT:PSS/FASnI 2 Br/ C 60 /Ca/Al reported a J SC of 6.82 mA cm −2 and V OC of 0.46 mV . Figure shows the structure of (a) FASnI 2 Br (SEM image) and (b) FASnI 3 (SEM image) and energy band diagram …”

Section: Hole Transport Materials and Electron Transport Materials In Lmentioning

confidence: 99%

“…FASnI 2 Br films with an architecture ITO/PEDOT:PSS/FASnI 2 Br/ C 60 /Ca/Al reported a J SC of 6.82 mA cm −2 and V OC of 0.46 mV . Figure shows the structure of (a) FASnI 2 Br (SEM image) and (b) FASnI 3 (SEM image) and energy band diagram …”

Section: Hole Transport Materials and Electron Transport Materials In Lmentioning

confidence: 99%

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Kour¹,

et al. 2019

View full text Add to dashboard Cite

Lead halide perovskites have displayed the highest solar power conversion efficiencies of 23% but the toxicity issues of these materials need to be addressed. Lead‐free perovskites have emerged as viable candidates for potential use as light harvesters to ensure clean and green photovoltaic technology. The substitution of lead by Sn, Ge, Bi, Sb, Cu and other potential candidates have reported efficiencies of up to 9%, but there is still a dire need to enhance their efficiencies and stability within the air. A comprehensive review is given on potential substitutes for lead‐free perovskites and their characteristic features like energy bandgaps and optical absorption as well as photovoltaic parameters like open‐circuit voltage (VOC), fill factor, short‐circuit current density (J SC), and the device architecture for their efficient use. Lead‐free perovskites do possess a suitable bandgap but have low efficiency. The use of additives has a significant effect on their efficiency and stability. The incorporation of cations like diethylammonium, phenylethyl ammonium, phenylethyl ammonium iodide, etc., or mixed cations at different compositions at the A‐site is reported with engineered bandgaps having significant efficiency and stability. Recent work on the advancement of lead‐free perovskites is also reviewed.

show abstract

Low-temperature processed solar cells with formamidinium tin halide perovskite/fullerene heterojunctions

Cited by 92 publications

References 35 publications

Highly Oriented Low-Dimensional Tin Halide Perovskites with Enhanced Stability and Photovoltaic Performance

Highly Oriented Low-Dimensional Tin Halide Perovskites with Enhanced Stability and Photovoltaic Performance

Tin Halide Perovskites: Progress and Challenges

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Contact Info

Product

Resources

About