New Acetylene‐Bridged 9,10‐Conjugated Anthracene Sensitizers: Application in Outdoor and Indoor Dye‐Sensitized Solar Cells

Abstract

In this report, a pivotal improvement in the performance of dye‐sensitized solar cells has been achieved, thus taking it one step closer toward the commercialization. Through the stepwise modification on the anthracene‐based organic sensitizers, the alteration of alkyl to alkoxy chain and incorporation of electron deficient moieties in the new sensitizing dyes TY3, TY4, and TY6 are found to play a significant role in the efficiency enhancement. The dye TY6, when tested under 1 sun (AM 1.5G) illumination, is found to exhibit the best efficiency of 8.08% in the series reported here. Taking it further, sensitizer TY6 achieves a milestone by displaying an efficiency of 28.56% when tested under T5 fluorescent illumination of 6000 lux and 20.72% under same illuminance from a commercial light emitting diode light source. Such an excellent performance can be attributed to its outstanding J SC and V OC, which are characteristic properties of these anthracene dyes.

High‐Performance Organic Dyes with Electron‐Deficient Quinoxalinoid Heterocycles for Dye‐Sensitized Solar Cells under One Sun and Indoor Light

“…MM-6 showed the highest performance among all, that is, 24.37 % under 600 lux, 27.58 %u nder 1000 lux, and 27.82 %u nder www.chemsuschem.org 2500 lux. These PCEs are comparable to those of the N719based cells under similarc onditions, that is, 17.21 %( 600 lux), 20.10 %( 1000 lux), and 24.63 %( 2500 lux), respectively.T he performance of MM-6 is only slightly lower than the recordhigh dye (28.56 %a t6 000 lux) reported by Tingare et al [60] Using DCA as co-absorbenti mproved the performance of MM-6 to 25.42 %( 600 lux), 27.40 %( 1000 lux), and 28.95 % (2500 lux). Moreover,t he co-sensitization of MM-3 and MM-6 resultedi nr emarkable PCEs of 27.76 %( 600 lux), 28.84 % (1000 lux), and 30.45 %( 2500 lux).…”

“…[59] Tingare et al reported that an acetylene-based anthracene sensitizer yieldeda PCE of 28.56 %u nder 6000 lux T5 fluorescent light. [60] Recently, Desta et al used ap yrazine-incorporated panchromatic sensitizer that reached PCE values of 18.85 %a nd 27.17 %, respectively,u nder 300 and 6000 lux of T5 fluorescent light. [61] By mixing our dyes MM-3 and MM-6,w ea chieved PCE valueso f 27.76 %, 28.74 %, and 30.45 %u nder 600, 1000, and 2500 lux, respectively,u nder TL84 fluorescent light.…”

Computational Prediction of Electronic and Photovoltaic Properties of Anthracene-Based Organic Dyes for Dye-Sensitized Solar Cells

“…Based on the MS3 sensitizer, TY3 (D-π-A) and TY6 (D-A-π-A) were also synthesized. TY6 has the best PCE (up to 8.80%) [36]. To study the relationship between structure and properties, we used the theory of density functional theory (DFT) and time-dependent density functional theory (TD-DFT) to calculate the three-molecular-geometry, electron injection, dye regeneration, and optical properties, and results confirmed that its excellent performance was due to its excellent J SC and V OC characteristics.…”

“…The three molecules (MS3, TY3, and TY6) used in this article and the experimental data mentioned were obtain from [36,37], and other data were calculated using software such as the Gaussian 09 package. In addition, other data generated or analyzed during this study are available from the first and corresponding authors on reasonable request.…”

Acene‐Modified Small‐Molecule Donors for Organic Photovoltaics

“…The easy synthesis of the fused acene cores reduced the number of steps required for synthesizingt hese small-molecule donors. [18][19][20] Previously reporteda cene-basedsmall molecules have shownh igh hole mobilities, which was attributed to high crystallinity,but limited PCEs owing to inferiormiscibility between acene-based small molecules and fullerene derivatives. [21][22][23] Therefore, carrying out modifications of the molecular structures and optimizationso fm orphologies are of great importance for achievinge fficient exciton dissociation at the donor/acceptor interface and high PCEs in OPVs by using acene-based small-molecule donors.…”