TY - JOUR
T1 - Structure–Transport Correlation Reveals Anisotropic Charge Transport in Coupled PbS Nanocrystal Superlattices
AU - Maier, Andre
AU - Lapkin, Dmitry
AU - Mukharamova, Nastasia
AU - Frech, Philipp
AU - Assalauova, Dameli
AU - Ignatenko, Alexandr
AU - Khubbutdinov, Ruslan
AU - Lazarev, Sergey
AU - Sprung, Michael
AU - Laible, Florian
AU - Löffler, Ronny
AU - Previdi, Nicolas
AU - Bräuer, Annika
AU - Günkel, Thomas
AU - Fleischer, Monika
AU - Schreiber, Frank
AU - Vartanyants, Ivan A.
AU - Scheele, Marcus
PY - 2020/9/1
Y1 - 2020/9/1
N2 - The assembly of colloidal semiconductive nanocrystals into highly ordered superlattices predicts novel structure-related properties by design. However, those structure–property relationships, such as charge transport depending on the structure or even directions of the superlattice, have remained unrevealed so far. Here, electric transport measurements and X-ray nanodiffraction are performed on self-assembled lead sulfide nanocrystal superlattices to investigate direction-dependent charge carrier transport in microscopic domains of these materials. By angular X-ray cross-correlation analysis, the structure and orientation of individual superlattices is determined, which are directly correlated with the electronic properties of the same microdomains. By that, strong evidence for the effect of superlattice crystallinity on the electric conductivity is found. Further, anisotropic charge transport in highly ordered monocrystalline domains is revealed, which is attributed to the dominant effect of shortest interparticle distance. This implies that transport anisotropy should be a general feature of weakly coupled nanocrystal superlattices.
AB - The assembly of colloidal semiconductive nanocrystals into highly ordered superlattices predicts novel structure-related properties by design. However, those structure–property relationships, such as charge transport depending on the structure or even directions of the superlattice, have remained unrevealed so far. Here, electric transport measurements and X-ray nanodiffraction are performed on self-assembled lead sulfide nanocrystal superlattices to investigate direction-dependent charge carrier transport in microscopic domains of these materials. By angular X-ray cross-correlation analysis, the structure and orientation of individual superlattices is determined, which are directly correlated with the electronic properties of the same microdomains. By that, strong evidence for the effect of superlattice crystallinity on the electric conductivity is found. Further, anisotropic charge transport in highly ordered monocrystalline domains is revealed, which is attributed to the dominant effect of shortest interparticle distance. This implies that transport anisotropy should be a general feature of weakly coupled nanocrystal superlattices.
KW - charge transport
KW - nanocrystals
KW - nanodiffraction
KW - self-assembly
KW - superlattices
UR - http://www.scopus.com/inward/record.url?scp=85088594914&partnerID=8YFLogxK
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U2 - 10.1002/adma.202002254
DO - 10.1002/adma.202002254
M3 - Article
AN - SCOPUS:85088594914
VL - 32
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 36
M1 - 2002254
ER -