High‐Performance Solution‐Processed Double‐Walled Carbon Nanotube Transparent Electrode for Perovskite Solar Cells. Issue 27 (24th June 2019)

• Record Type: Journal Article
• Authors: Jeon, Il; Yoon, Jungjin; Kim, Unsoo; Lee, Changsoo; Xiang, Rong; Shawky, Ahmed; Xi, Jun; Byeon, Junseop; Lee, Hyuck Mo; Choi, Mansoo; Maruyama, Shigeo; Matsuo, Yutaka
• Is Part Of: Advanced energy materials. Volume 9:Issue 27(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-06-24
• Subjects: double‐walled nanotubes -- indium free -- perovskite solar cells -- solution‐processed electrodes -- transparent electrodes; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201901204
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: Double‐walled carbon nanotubes are between single‐walled carbon nanotubes and multiwalled carbon nanotubes. They are comparable to single‐walled carbon nanotubes with respect to the light optical density, but their mechanical stability and solubility are higher. Exploiting such advantages, solution‐processed transparent electrodes are demonstrated using double‐walled carbon nanotubes and their application to perovskite solar cells is also demonstrated. Perovskite solar cells which harvest clean solar power have attracted a lot of attention as a next‐generation renewable energy source. However, their eco‐friendliness, cost, and flexibility are limited by the use of transparent oxide conductors, which are inflexible, difficult to fabricate, and made up of expensive rare metals. Solution‐processed double‐walled carbon nanotubes can replace conventional transparent electrodes to resolve such issues. Perovskite solar cells using the double‐walled carbon nanotube transparent electrodes produce an operating power conversion efficiency of 17.2% without hysteresis. As the first solution‐processed electrode‐based perovskite solar cells, this work will pave the pathway to the large‐size, low‐cost, and eco‐friendly solar devices. Abstract : Solution‐processed double‐walled carbon nanotubes function as transparent electrodes in inverted‐type planar heterojunction perovskite solar cells. Double‐walled carbon nanotubes exhibit high optical conductivity and solubility. Good energy level alignment and morphology of the electrodes leads to an operating power conversion efficiency of 17.2%, which is the highest among the carbon nanotube electrode‐based perovskite solar cells.