DataVXACS Energy LettersPaper
journal article·2023-04-14

Buried Interface Passivation of Perovskite Solar Cells by Atomic Layer Deposition of Al2O3

Sudeshna Ghosh, Debasmita Pariari, Tejmani Behera, Pablo P. Boix, Narasimha Ganesh, Susmita Basak, Arya Vidhan, Nisha Sarda, Iván Mora-Seró, Arindam Chowdhury, Kavassery Sureswaran Narayan, D. D. Sarma, Shaibal K. Sarkar

ACS Energy Letters· Volume 8· Issue 4
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Source abstract

Abstract

Despite having long excited carrier lifetimes and high mobilities in hybrid halide perovskite materials, conventional (n-i-p) devices exhibit significant interfacial nonradiative recombination losses that are little understood but limit the radiative efficiency and the overall open-circuit potential. In this Letter, we reveal that the process of spiro-OMeTAD coating on perovskite gives rise to buried defect states, which are detrimental to the devices’ operational stability. We subsequently report a method to passivate these deleterious buried defect states by atomic layer deposition of Al 2 O 3 through controlled precursor dosages on fully functional devices. The process results in notable improvements in the overall device performance, but the underlying root-cause analysis is what we essentially aimed to elucidate here. The reported passivation technique results in (a) an increase in the efficiency primarily due to an increase of V OC by ∼60–70 mV and consequently (b) enhanced photoluminescence and higher electroluminescence quantum efficiency and (c) overall device operational (MPPT) stability under ambient and, exclusively, even under high vacuum (>300 h) conditions, which is otherwise challenging.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materialsMaterials processing

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Powai 400 076 Mumbai, India

Solid State and Structural Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India

Department of Chemistry, Indian Institute of Technology Bombay, Powai 400 076 Mumbai, India

Institut de Ciència dels Materials, University of Valencia, Catedràtic J. Beltran,246980 Paterna, Valencia, Spain

Chemistry and Physics of Material Unit (CPMU), Jawaharlal Nehru Center for Advanced Scientific Research, Bengaluru 560064, India

Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai 400 076 Mumbai, India

Institute of Advanced Materials, Universitat Jaume I, Av. de Vicent Sos Baynat, s/n 12071 Castelló de la Plana, Spain

Funding

Council??of??Scientific and Industrial Research, India · University Grants Commission · Science and Engineering Research Board · Ministry of New and Renewable Energy India · Department of Science and Technology, Ministry of Science and Technology

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