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Showing 1 to 12 of 14 entries
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Correlation between Photoluminescence and Carrier Transport and a Simple In Situ Passivation Method for High-Bandgap Hybrid Perovskites.

The journal of physical chemistry letters

Stoddard RJ, Eickemeyer FT, Katahara JK, Hillhouse HW.
PMID: 28636388
J Phys Chem Lett. 2017 Jul 20;8(14):3289-3298. doi: 10.1021/acs.jpclett.7b01185. Epub 2017 Jul 10.

High-bandgap mixed-halide hybrid perovskites have higher open-circuit voltage deficits and lower carrier diffusion lengths than their lower-bandgap counterparts. We have developed a ligand-assisted crystallization (LAC) technique that introduces additives in situ during the solvent wash and developed a new...

Solution-Processed BiI.

ACS omega

Williamson BW, Eickemeyer FT, Hillhouse HW.
PMID: 31457997
ACS Omega. 2018 Oct 05;3(10):12713-12721. doi: 10.1021/acsomega.8b00813. eCollection 2018 Oct 31.

We present a mechanistic explanation of the BiI

Multimodal host-guest complexation for efficient and stable perovskite photovoltaics.

Nature communications

Zhang H, Eickemeyer FT, Zhou Z, Mladenović M, Jahanbakhshi F, Merten L, Hinderhofer A, Hope MA, Ouellette O, Mishra A, Ahlawat P, Ren D, Su TS, Krishna A, Wang Z, Dong Z, Guo J, Zakeeruddin SM, Schreiber F, Hagfeldt A, Emsley L, Rothlisberger U, Milić JV, Grätzel M.
PMID: 34099667
Nat Commun. 2021 Jun 07;12(1):3383. doi: 10.1038/s41467-021-23566-2.

Formamidinium lead iodide perovskites are promising light-harvesting materials, yet stabilizing them under operating conditions without compromising optimal optoelectronic properties remains challenging. We report a multimodal host-guest complexation strategy to overcome this challenge using a crown ether, dibenzo-21-crown-7, which acts...

Tailored Amphiphilic Molecular Mitigators for Stable Perovskite Solar Cells with 23.5% Efficiency.

Advanced materials (Deerfield Beach, Fla.)

Zhu H, Liu Y, Eickemeyer FT, Pan L, Ren D, Ruiz-Preciado MA, Carlsen B, Yang B, Dong X, Wang Z, Liu H, Wang S, Zakeeruddin SM, Hagfeldt A, Dar MI, Li X, Grätzel M.
PMID: 32068922
Adv Mater. 2020 Mar;32(12):e1907757. doi: 10.1002/adma.201907757. Epub 2020 Feb 18.

Passivation of interfacial defects serves as an effective means to realize highly efficient and stable perovskite solar cells (PSCs). However, most molecular modulators currently used to mitigate such defects form poorly conductive aggregates at the perovskite interface with the...

Crown Ether Modulation Enables over 23% Efficient Formamidinium-Based Perovskite Solar Cells.

Journal of the American Chemical Society

Su TS, Eickemeyer FT, Hope MA, Jahanbakhshi F, Mladenović M, Li J, Zhou Z, Mishra A, Yum JH, Ren D, Krishna A, Ouellette O, Wei TC, Zhou H, Huang HH, Mensi MD, Sivula K, Zakeeruddin SM, Milić JV, Hagfeldt A, Rothlisberger U, Emsley L, Zhang H, Grätzel M.
PMID: 33170007
J Am Chem Soc. 2020 Nov 25;142(47):19980-19991. doi: 10.1021/jacs.0c08592. Epub 2020 Nov 10.

The use of molecular modulators to reduce the defect density at the surface and grain boundaries of perovskite materials has been demonstrated to be an effective approach to enhance the photovoltaic performance and device stability of perovskite solar cells....

Slowing the spread of COVID-19: Review of "Social distancing" interventions deployed by public transit in the United States and Canada.

Transport policy

Kamga C, Eickemeyer P.
PMID: 33814735
Transp Policy (Oxf). 2021 Jun;106:25-36. doi: 10.1016/j.tranpol.2021.03.014. Epub 2021 Mar 27.

This paper presents a review of social distancing measures deployed by transit agencies in the United States and Canada during the COVID-19 pandemic and discusses how specific operators across the two countries have implemented changes. Challenges and impacts on...

Controlled shaping of ultrafast electric field transients in the mid-infrared spectral range.

Optics letters

Eickemeyer F, Kaindl RA, Woerner M, Elsaesser T, Weiner AM.
PMID: 18066252
Opt Lett. 2000 Oct 01;25(19):1472-4. doi: 10.1364/ol.25.001472.

We experimentally demonstrate amplitude and phase shaping of femtosecond mid-infrared pulses in a range centered about 14 mum . Single pulses with a tailored optical phase and phase-locked double pulses are generated by phase-matched difference-frequency mixing in a GaSe...

Pseudo-halide anion engineering for α-FAPbI.

Nature

Jeong J, Kim M, Seo J, Lu H, Ahlawat P, Mishra A, Yang Y, Hope MA, Eickemeyer FT, Kim M, Yoon YJ, Choi IW, Darwich BP, Choi SJ, Jo Y, Lee JH, Walker B, Zakeeruddin SM, Emsley L, Rothlisberger U, Hagfeldt A, Kim DS, Grätzel M, Kim JY.
PMID: 33820983
Nature. 2021 Apr;592(7854):381-385. doi: 10.1038/s41586-021-03406-5. Epub 2021 Apr 05.

Metal halide perovskites of the general formula ABX

Vapor-assisted deposition of highly efficient, stable black-phase FAPbI.

Science (New York, N.Y.)

Lu H, Liu Y, Ahlawat P, Mishra A, Tress WR, Eickemeyer FT, Yang Y, Fu F, Wang Z, Avalos CE, Carlsen BI, Agarwalla A, Zhang X, Li X, Zhan Y, Zakeeruddin SM, Emsley L, Rothlisberger U, Zheng L, Hagfeldt A, Grätzel M.
PMID: 33004488
Science. 2020 Oct 02;370(6512). doi: 10.1126/science.abb8985.

Mixtures of cations or halides with FAPbI

Stabilization of Highly Efficient and Stable Phase-Pure FAPbI.

Angewandte Chemie (International ed. in English)

Liu Y, Akin S, Hinderhofer A, Eickemeyer FT, Zhu H, Seo JY, Zhang J, Schreiber F, Zhang H, Zakeeruddin SM, Hagfeldt A, Dar MI, Grätzel M.
PMID: 32400061
Angew Chem Int Ed Engl. 2020 Sep 01;59(36):15688-15694. doi: 10.1002/anie.202005211. Epub 2020 Jun 22.

As a result of their attractive optoelectronic properties, metal halide APbI

Synergistic Effect of Fluorinated Passivator and Hole Transport Dopant Enables Stable Perovskite Solar Cells with an Efficiency Near 24.

Journal of the American Chemical Society

Zhu H, Ren Y, Pan L, Ouellette O, Eickemeyer FT, Wu Y, Li X, Wang S, Liu H, Dong X, Zakeeruddin SM, Liu Y, Hagfeldt A, Grätzel M.
PMID: 33600169
J Am Chem Soc. 2021 Mar 03;143(8):3231-3237. doi: 10.1021/jacs.0c12802. Epub 2021 Feb 18.

Long-term durability is critically important for the commercialization of perovskite solar cells (PSCs). The ionic character of the perovskite and the hydrophilicity of commonly used additives for the hole-transporting layer (HTL), such as lithium bis(trifluoromethanesulfonyl)imide (Li-TFSI) and

Ultrafast coherent electron transport in semiconductor quantum cascade structures.

Physical review letters

Eickemeyer F, Reimann K, Woerner M, Elsaesser T, Barbieri S, Sirtori C, Strasser G, Müller T, Bratschitsch R, Unterrainer K.
PMID: 12144499
Phys Rev Lett. 2002 Jul 22;89(4):047402. doi: 10.1103/PhysRevLett.89.047402. Epub 2002 Jul 03.

Coherent electron transport is studied in an electrically driven quantum cascade structure. Ultrafast quantum transport from the injector into the upper laser state is investigated by midinfrared pump-probe experiments directly monitoring the femtosecond saturation and subsequent recovery of electrically...

Showing 1 to 12 of 14 entries