Comprehensive control of voltage loss enables 11.7% efficient solid-state dye-sensitized solar cells.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F18%3A00491222" target="_blank" >RIV/61388955:_____/18:00491222 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c8ee00661j" target="_blank" >http://dx.doi.org/10.1039/c8ee00661j</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c8ee00661j" target="_blank" >10.1039/c8ee00661j</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comprehensive control of voltage loss enables 11.7% efficient solid-state dye-sensitized solar cells.

Popis výsledku v původním jazyce

The relatively large voltage loss (V-loss) in excitonic type solar cells severely limits their power conversion efficiencies (PCEs). Here, we report a comprehensive control of V-loss through efficacious engineering of the sensitizer and redox mediator, making a breakthrough in the PCE of dye-sensitized solar cells (DSSCs). The targeted down-regulation of V-loss is successfully realized by three valid channels: (i) reducing the driving force of electron injection through dye molecular engineering, (ii) decreasing the dye regeneration overpotential through redox mediator engineering, and (iii) suppressing interfacial electron recombination. Significantly, the `` trade-off'' effect between the dye optical band gap and the open-circuit voltage (V-OC) is minimized to a great extent, achieving a distinct enhancement in photovoltaic performance (PCE > 11.5% with V-OC up to 1.1 V) for liquid junction cells. The solidification of the best-performing device leads to a PCE of 11.7%, which is so far the highest efficiency obtained for solid-state DSSCs. Our work inspires further development in highly efficient excitonic solar cells by comprehensive control of V-loss.

Název v anglickém jazyce

Comprehensive control of voltage loss enables 11.7% efficient solid-state dye-sensitized solar cells.

Popis výsledku anglicky

The relatively large voltage loss (V-loss) in excitonic type solar cells severely limits their power conversion efficiencies (PCEs). Here, we report a comprehensive control of V-loss through efficacious engineering of the sensitizer and redox mediator, making a breakthrough in the PCE of dye-sensitized solar cells (DSSCs). The targeted down-regulation of V-loss is successfully realized by three valid channels: (i) reducing the driving force of electron injection through dye molecular engineering, (ii) decreasing the dye regeneration overpotential through redox mediator engineering, and (iii) suppressing interfacial electron recombination. Significantly, the `` trade-off'' effect between the dye optical band gap and the open-circuit voltage (V-OC) is minimized to a great extent, achieving a distinct enhancement in photovoltaic performance (PCE > 11.5% with V-OC up to 1.1 V) for liquid junction cells. The solidification of the best-performing device leads to a PCE of 11.7%, which is so far the highest efficiency obtained for solid-state DSSCs. Our work inspires further development in highly efficient excitonic solar cells by comprehensive control of V-loss.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/GA13-07724S" target="_blank" >GA13-07724S: Materiálové inženýrství pro inovativní Graetzelovy solární články</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Energy & Environmental Science

ISSN

1754-5692

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

1779-1787

Kód UT WoS článku

000438392400013

EID výsledku v databázi Scopus

2-s2.0-85050134931