title: Remote trap passivation in colloidal quantum dot bulk nano-heterojunctions and its effect in solution-processed solar cells.
abstract: More-efficient charge collection and suppressed trap recombination in colloidal quantum dot (CQD) solar cells is achieved by means of a bulk nano-heterojunction (BNH) structure, in which p-type and n-type materials are blended on the nanometer scale. The improved performance of the BNH devices, compared with that of bilayer devices, is displayed in higher photocurrents and higher open-circuit voltages (resulting from a trap passivation mechanism).
authors.affiliation: ICFO - Institut de Ciéncies Fotóniques, Mediterranean Technology Park, Av. Carl Friedrich Gauss, 3, 08860, Castelldefels, Barcelona, Spain; CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India.
authors.forename: Arup K
authors.initials: AK
authors.lastname: Rath
authors.forename: F
authors.initials: F
authors.lastname: Pelayo Garcia de Arquer
authors.forename: Alexandros
authors.initials: A
authors.lastname: Stavrinadis
authors.forename: Tania
authors.initials: T
authors.lastname: Lasanta
authors.forename: Maria
authors.initials: M
authors.lastname: Bernechea
authors.forename: Silke L
authors.initials: SL
authors.lastname: Diedenhofen
authors.forename: Gerasimos
authors.initials: G
authors.lastname: Konstantatos
mesh_terms: D003102:Colloids; D011211:Electric Power Supplies; D007854:Lead / Q000737:chemistry; D036103:Nanotechnology / Q000295:instrumentation*; D045663:Quantum Dots / Q000737:chemistry*; D012993:Solar Energy; D012996:Solutions; D013440:Sulfides / Q000737:chemistry; D013696:Temperature; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D003102:Colloids; D012996:Solutions; D013440:Sulfides; C018391:lead sulfide; D007854:Lead; D015034:Zinc Oxide
keywords: bulk nano-heterojunctions; colloidal quantum dots; recombination; solar cells; trap states