A double hole-transport layer strategy toward efficient mixed tin-lead iodide perovskite solar cell

Song, Jiaxing; Hu, Weidong; Li, Zaifang; Tian, Wenjing

doi:10.1016/j.solmat.2019.110351

Cited by 28 publications

(19 citation statements)

References 41 publications

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“…It is still unknown whether the bulk or the interfacial recombination at the hole-selective/ electron selective contacts dominate the overall non-radiative carrier losses in the finished solar cells. Although various hole transporters have been reported to work with Sn-containing perovskites in a few isolated studies, [71,[102][103][104] there has not yet been universal consensus on a candidate to replace PEDOT:PSS as the hole transporter. This appears to be due to the shallower VBM and CBM in Sn-containing perovskites as compared to their pure-Pb counterparts.…”

Section: Discussionmentioning

confidence: 99%

Optoelectronic Properties of Low‐Bandgap Halide Perovskites for Solar Cell Applications

2021

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Krishanu Dey obtained his B.Tech. in electronics and communication engineering from NIT Silchar, India in 2016. Following this, he moved to National University of Singapore to obtain M.Eng. (Research) in electrical and computer engineering in 2018. He has been pursuing his Ph.D. studies at the Cavendish Laboratory in the University of Cambridge since 2018 and is also a member of Churchill College, Cambridge. Under the supervision of Dr. Sam Stranks, his research primarily focuses on understanding interesting properties of mixed lead-tin halide perovskite materials and their subsequent applications in various electronic and optoelectronic devices. Bart Roose obtained his Ph.D. from the Adolphe Merkle Institute (Fribourg, Switzerland), studying metal oxide contacts for perovskite solar cells. He then took up a Newton International Fellowship at the Cavendish Laboratory (Cambridge, UK) to study aging and degradation mechanisms of lead halide perovskites. He is currently leading the photovoltaic research activities at the Optoelectronic Materials and Device Spectroscopy Group in the Department of Chemical Engineering & Biotechnology (Cambridge, UK), focusing on all-perovskite tandem solar cells. His research interests are dynamic processes, sustainability, and novel applications of emerging photovoltaic technologies.

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Section: Discussionmentioning

confidence: 99%

Optoelectronic Properties of Low‐Bandgap Halide Perovskites for Solar Cell Applications

2021

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“…In 2020, Song et al developed a CuI/PEDOT:PSS double HTL for (FASnI 3 ) 0.6 (MAPbI 3 ) 0.4 ‐based PSCs. [ 152 ] The authors revealed a faster charge extraction and more efficient charge transport with the double HTL than with PEDOT:PSS and CuI layers alone. It was assigned to the cascading energy alignment together with the high charge mobility of CuI.…”

Section: Sn–pb‐based Lead‐less Pscsmentioning

confidence: 99%

Lead‐Less Halide Perovskite Solar Cells

Gollino

Pauporté

2021

Solar RRL

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The rise and commercialization of perovskite solar cells (PSCs) is hindered by the toxicity of lead present in the perovskites used as the solar light absorber. To counter this problem, lead (Pb) can be fully (lead‐free) or partially (lead‐less) replaced by diverse elements. The former compounds suffer from poor efficiency and poor stability, whereas the later appear more promising. Herein, a survey of the methods reported in the literature to reduce Pb content in PSCs to fabricate “lead‐less” (also called “lead‐deficient”) PSCs is offered. First, the comparison of Sn and Pb elements and the partial replacement of Pb by Sn are developed. Then, its substitution by either Ge, Sr, or other alkaline‐earth‐metals, transition metals, and elements from columns 12, 13, and 15 of the periodic table are detailed. The new families of perovskites based on the insertion of organic cations to replace lead and halogen units, namely the “lead‐deficient” and “hollow” halide perovskites are then presented and discussed. Finally, atypical ways to reduce the toxicity of PSCs are presented: perovskite layer thickness reduction via optimization of photon collection, integration of photonic structures, and usage of recycled lead. The current achievements and the outlook of those strategies are presented and discussed.

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“…[20] All these results specify that KSCN addition can help to enhance the crystallinity and achieve a highly pure perovskite crystal phase which is beneficial for the improvement of the photoelectric performance of the perovskites. [21] To investigate the optical properties of the perovskite films before and after KSCN addition, UV-vis absorption, photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectra have been performed in this study. In Figure 3c, the film with or without KSCN incorporation shows the similar absorption profiles.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Optimization of Bulk Defects in Sn/Pb Mixed Perovskite Solar Cells Through Synergistic Effect of Potassium Thiocyanate

Chen

Matondo

et al. 2020

Solar RRL

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The organic–inorganic Sn–Pb mixed perovskite has achieved great progress during the last 10 years and is considered as one of the most promising low‐bandgap photovoltaic materials. It has lower toxicity, outstanding optoelectrical properties, and achieved remarkable performance. However, there are still plenty of challenges in controlling the morphology, crystallinity, and defects of the Sn–Pb mixed perovskite film because of the inferior chemical stability of Sn compared with Pb. Herein, it is found that the synergistic effect of potassium thiocyanate (KSCN) in the Sn–Pb mixed perovskites can enlarge the grain size, enhance the crystallization, improve the film morphology, and obtain high‐quality perovskite films which effectively eliminate the bulk defects and smooth carrier transportation of Sn–Pb mixed perovskite solar cells. Through optimizing the concentration of KSCN, a high‐performance MA0.5FA0.5Pb0.5Sn0.5I3 solar cell with an efficiency of 15.14% and improved stability is obtained. This work lays a key foundation for the fabrication of efficient and stable Sn‐based or Sn–Pb mixed perovskite solar devices.

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A double hole-transport layer strategy toward efficient mixed tin-lead iodide perovskite solar cell

Cited by 28 publications

References 41 publications

Optoelectronic Properties of Low‐Bandgap Halide Perovskites for Solar Cell Applications

Optoelectronic Properties of Low‐Bandgap Halide Perovskites for Solar Cell Applications

Lead‐Less Halide Perovskite Solar Cells

Optimization of Bulk Defects in Sn/Pb Mixed Perovskite Solar Cells Through Synergistic Effect of Potassium Thiocyanate

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