DOI: 10.1002/adma.19970090915. Controlling electronic properties of CdTe by adsorption of dicarboxylic acid derivatives: Relating molecular parameters to band bending and electron affinity changes

Controlling electronic properties of CdTe by adsorption of dicarboxylic acid derivatives: Relating molecular parameters to band bending and electron affinity changes

10.1002/adma.19970090915

Crossref journal-article

Wiley

Advanced Materials (311)

Abstract

Surface modifications have great potential to control semiconductor properties such as band bending (BB) and electron affinity (EA). It is demonstrated that tailor‐made, surface‐binding molecules—discarboxylic acid derivatives with aromatic substituents in this case—can be used to modify systematically both the EA and BB of CdSe. The molecular parameters that affect each of these have been resolved and a semiquantitative model is put forward to rationalize the observed molecule‐induced band‐bending energies.

Bibliography

Cohen, R., Bastide, S., Cahen, D., Libman, J., Shanzer, A., & Rosenwaks, Y. (1997). Controlling electronic properties of CdTe by adsorption of dicarboxylic acid derivatives: Relating molecular parameters to band bending and electron affinity changes. Advanced Materials, 9(9), 746â749. Portico.

Authors 6

Rami Cohen (first)
Stéphane Bastide (additional)
David Cahen (additional)
Jacqueline Libman (additional)
Abraham Shanzer (additional)
Yossi Rosenwaks (additional)

References 41 Referenced 51

EA is the energy difference of electrons at vacuum (just outside the range of the image forces) and at the bottom of the conduction band at the surface. BB is the electric potential difference between the surface and bulk of the semiconductor.
10.1007/978-3-662-03134-6
10.1007/978-3-662-10159-9
10.1088/0031-8949/1989/T25/050
10.1063/1.98415
10.1116/1.576979
10.1063/1.356376
10.1149/1.2129201
10.1063/1.100930
10.1063/1.115177
10.1021/ja00179a019
10.1126/science.248.4957.840
10.1021/j100043a047
10.1063/1.349741
10.1021/ja00273a004
10.1021/j100364a069
10.1021/j100123a041
10.1021/ja00223a007
10.1021/ja00196a020
10.1021/cr00033a003
10.1021/ja00086a029
10.1021/j100020a073
10.1021/jp9626935
M.Bruening R.Cohen J. F.Guillemoles T.Moav J.Libman A.Shanzer D.Cahen J. Am. Chem. Soc. in press.
10.1063/1.348712
Sample preparation is detailed elsewhere.
FTIR spectra were measured in transmission mode (Bruker FTIR IFS66) with etched sample as background.
{'key': 'e_1_2_1_28_2', 'volume-title': 'The Handbook of Infrared and Raman Characteristic Frequencies of Organic Molecules', 'author': 'Lin‐Vien D.', 'year': '1991'} / The Handbook of Infrared and Raman Characteristic Frequencies of Organic Molecules by Lin‐Vien D. (1991)
{'key': 'e_1_2_1_29_2', 'volume-title': 'Infrared and Raman Spectra of Inorganic and Coordination Compounds', 'author': 'Nakamoto K.', 'year': '1986'} / Infrared and Raman Spectra of Inorganic and Coordination Compounds by Nakamoto K. (1986)
10.1016/S0010-8545(00)80455-5
FTIR of the dicarboxylates did not enable us to determine the preferred mode of coordination because of unfavorable signal/noise although unidentate coordination seemed to dominate.
10.1016/0021-9797(88)90140-3
We assumed that the extinction coefficients of Na‐carboxylate and surface‐bound Cd‐carboxylate stretches are comparable.
Adsorption of DMDC increased the EA by 110 mV. This can be accounted for by the hydrogen bonding and even proton transfer between the molecules as indicated by FTIR.
10.1021/ja00011a010
The molecules LUMO levels were estimated by applying Koopman's theorem according to which a molecules LUMO level can be determined by subtracting its lowest singlet energy transition (hv=ELUMo‐ EHOMO) from its ionization potential IP
{'key': 'e_1_2_1_36_3', 'first-page': '166', 'volume-title': 'Inorganic Chemistry: Principles of Structure and Reactivity', 'author': 'Huheey J. E.', 'year': '1993'} / Inorganic Chemistry: Principles of Structure and Reactivity by Huheey J. E. (1993)
10.1021/cr60129a007
All of our CPD measurements i.e. those yielding the energetics both before and after adsorption were done in air. This means that our initial and final states are gas–solid rather than liquid–solid ones. Therefore the model presents the molecule's energy in the gas phase and the surface energy in air even though the molecule–surface interaction took place in solution.
{'key': 'e_1_2_1_38_2', 'volume-title': 'CRC Handbook of Chemistry and Physics', 'author': 'Lide D. R.', 'year': '1994'} / CRC Handbook of Chemistry and Physics by Lide D. R. (1994)
Adsorption of BA overnight or for 10 min did not change the BB; CBA adsorption overnight induced a BB change (120 mV) in contrast to what is observed after adsorption for 10 min (< 50 mV). We ascribe this difference to the adsorption kinetics of BAson CdTe and to the different crystal source [21].

Dates

Type	When
Created	20 years, 2 months ago (May 29, 2005, 3:54 a.m.)
Deposited	1 year, 9 months ago (Nov. 20, 2023, 6:16 p.m.)
Indexed	1 year, 6 months ago (Feb. 10, 2024, 3 p.m.)
Issued	28 years, 7 months ago (Jan. 1, 1997)
Published	28 years, 7 months ago (Jan. 1, 1997)
Published Online	20 years, 9 months ago (Oct. 29, 2004)
Published Print	28 years, 7 months ago (Jan. 1, 1997)

Funders 0

None

BibTeX

@article{Cohen_1997, title={Controlling electronic properties of CdTe by adsorption of dicarboxylic acid derivatives: Relating molecular parameters to band bending and electron affinity changes}, volume={9}, ISSN={1521-4095}, url={http://dx.doi.org/10.1002/adma.19970090915}, DOI={10.1002/adma.19970090915}, number={9}, journal={Advanced Materials}, publisher={Wiley}, author={Cohen, Rami and Bastide, Stéphane and Cahen, David and Libman, Jacqueline and Shanzer, Abraham and Rosenwaks, Yossi}, year={1997}, month=jan, pages={746–749} }

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