Improvement of dye-sensitized solar cells toward the broader light harvesting of the solar spectrum

Abstract

Dye-sensitized solar cells (DSSCs) have been extensively evolved for the past two decades in order to improve their cell performance. From the commercialization point of view, the overall solar to electrical energy conversion efficiency should compete with other solar cells. But, due to structural restrictions of DSSC using the liquid electrolyte and a space requirement between two electrodes, the direct tandem construction of DSSCs by stacking of repeating units is highly limited. In this feature article, important research trials to overcome these barriers and a recent research trend to improve the light harvesting strategies mainly panchromatic engineering, various tandem approaches such as parallel tandem, series tandem, p-n tandem etc., have been briefly reviewed.

Dicyanovinyl and Cyano-Ester Benzoindolenine Squaraine Dyes: The Effect of the Central Functionalization on Dye-Sensitized Solar Cell Performance

“…The design of efficient sensitizers combining high molar extinction coefficients and a panchromatic spectral response, from visible to near-IR (NIR) wavelengths, is so far a grail not yet achieved. Extending optical absorption of the metal to ligand charge transfer (MLCT) band towards the NIR region has been achieved on metal-organic Ru-based dyes [2,3], as well as for fully organic dyes with similar behavior [4].…”

Новые Типы Тандемных Фотопреобразователей На Основе Сенсибилизированных И Перовскитных Солнечных Элементов С Центральным Противоэлектродом

“…Возможность дальнейшего повышения эффективности DSC ограничивается узким диапазоном оптического по-глощения сенсибилизаторов. Увеличение эффективности DSC возможно за счет использования комбинации сенсибилизаторов с различными оптическими характеристиками [7,8]. Один из наиболее перспективных путей повышения эффективности заключается в применении тандемных солнечных элементов (ТСЭ), которые сочетают DSC, преобразующие различные взаимодополняющие области солнечного спектра [9,10].…”

Enhancing the Spectral Response of Mesoporous ZnO Films of Dye–sensitized Solar Cells by Incorporating Metal-free Organic Sensitizer and N719 dye

“…One of the feasible ways is to develop highly efficient organic dyes which have high molecular design flexibility, high molar extinction coefficients, and less toxicity with compared to their counterparts [4,5]. However, the individual organic sensitizer can only absorb a relatively narrow range of the solar spectrum, causing the limited light harvesting efficiency and therefore less excited electron/hole pairs.…”