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Diffraction‐limited, high‐contrast photopatterning of the photoluminescence of layer‐by‐layer films comprising CdSe@CdS@ZnS quantum dots and polyviologen is reported. The photoluminescence of the quantum dots is initially quantitatively quenched due to ultrafast photoinduced electron transfer to polyviologen. Photopatterning is achieved by high‐power or prolonged illumination in air, which photochemically...
Poly(viologen) quenches the photoluminescence of CdSe quantum dots via a charge transfer as shown by E. A. Weiss and co‐workers on page 3617. Continuous illumination of a composite film of quantum dots and poly(viologen) through a mask, or by a scanning laser beam, reveals diffractionlimited patterns of photoluminescence in the film by degrading the quenching viologen in its cation radical form.
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