Evaluation of the Passivation Effects of PEDOT:PSS on Inverted Perovskite Solar Cells

Qi, Yue; Almtiri, Mohammed; Giri, Hari; Jha, Surabhi; Ma, Guorong; Shaik, Abdul Kalam; Zhang, Qiqi; Pradhan, Nihar; Gu, Xiaodan; Hammer, Nathan I.; Patton, Derek L.; Scott, Colleen N.; Dai, Qilin

doi:10.1002/aenm.202202713

Cited by 53 publications

(46 citation statements)

References 168 publications

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“…The hysteresis effects can be characterized using the hysteresis index (HI) as the reference. 39 As listed in Table S3, the HI significantly decreases from 0.107 for Reference-PSC to 0.036 for PI-PSC and 0.061 for PZ-PSC, confirming that PI-PSC has the smallest HI. It is well-known that a smaller HI means more efficient charge transport and less ion migration, 40 which can contribute to the best PV performance of PI-PSC.…”

Section: Resultsmentioning

confidence: 66%

“…Figure a shows the PL spectra of Reference-, PI-, and PZ-films. Obviously, the PI- and PZ-films exhibit a higher PL intensity, and the PI-film exhibits the highest PL intensity, indicating that the introduction of PI can remarkably suppress nonradiative recombination and effectively passivate trap states . Meanwhile, the peak of the PI-film exhibits a slight blue shift compared with that of the Reference-film.…”

Section: Resultsmentioning

confidence: 97%

“…Table S3 displays the corresponding photovoltaic parameters. The hysteresis effects can be characterized using the hysteresis index (HI) as the reference . As listed in Table S3, the HI significantly decreases from 0.107 for Reference-PSC to 0.036 for PI-PSC and 0.061 for PZ-PSC, confirming that PI-PSC has the smallest HI.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Significantly Improved Efficiency and Stability of Pure Tin-Based Perovskite Solar Cells with Bifunctional Molecules

Luo

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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Tin-based perovskite solar cells (TPSCs) have become one of the most prospective photovoltaic materials due to their remarkable optoelectronic properties and relatively low toxicity. Nevertheless, the rapid crystallization of perovskites and the easy oxidization of Sn2+ to Sn4+ make it challenging to fabricate efficient TPSCs. In this work, a piperazine iodide (PI) material with −NH– and −NH2 +– bifunctional groups is synthesized and introduced into the PEA0.1FA0.9SnI3-based precursor solution to tune the microstructure, charge transport, and stability of TPSCs. Compared with piperazine (PZ) containing only the −NH– group, the PI additive displays better effects on regulating the microstructure and crystallization, inhibiting Sn2+ oxidation and reducing trap states, resulting in an optimal efficiency of 10.33%. This is substantially better than that of the reference device (6.42%). Benefiting from the fact that PI containing −NH– and −NH2 +– groups can passivate both positively charged defects and negatively charged halogen defects, unencapsulated TPSCs modified with the PI material can maintain about 90% of their original efficiency after being kept in a N2 atmosphere for 1000 h, much higher than the value of 47% in reference TPSCs without additives. This work provides a practical method to prepare efficient and stable pure TPSCs.

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Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 97%

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Significantly Improved Efficiency and Stability of Pure Tin-Based Perovskite Solar Cells with Bifunctional Molecules

Luo

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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“…Compared to the control PEDOT:PSS, the Ti 3 C 2 T x @PEDOT:PSS (1 wt.%) film exhibits higher slope values, which means the modified film has smaller contact resistance and higher hole mobility values. [ 21 ] From the Raman spectroscopy in Figure 4b, pristine PEDOT:PSS exhibited a prominent peak at 1433 cm −1 corresponding to C α = C β symmetrical stretching vibration of the five‐membered thiophene rings on PEDOT. After the introduction of Ti 3 C 2 T x , this peak was red‐shifted.…”

Section: Resultsmentioning

confidence: 99%

Boosting Charge Utilization in Self‐Powered Photodetector for Real‐Time High‐Throughput Ultraviolet Communication

et al. 2023

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Ultraviolet (UV) communication is a cutting‐edge technology in communication battlefields, and self‐powered photodetectors as their optical receivers hold great potential. However, suboptimal charge utilization has largely limited the further performance enhancement of self‐powered photodetectors for high‐throughput communication application. Herein, a self‐powered Ti3C2Tx‐hybrid poly(3,4 ethylenedioxythiophene):poly‐styrene sulfonate (PEDOT:PSS)/ZnO (TPZ) photodetector is designed, which aims to boost charge utilization for desirable applications. The device takes advantage of photothermal effect to intensify pyro‐photoelectric effect as well as the increased conductivity of the PEDOT:PSS, which significantly facilitated charge separation, accelerated charge transport, and suppressed interface charge recombination. Consequently, the self‐powered TPZ photodetector exhibits superior comprehensive performance with high responsivity of 12.3 mA W−1 and fast response time of 62.2 µs, together with outstanding reversible and stable cyclic operation. Furthermore, the TPZ photodetector has been successfully applied in an integrated UV communication system as the self‐powered optical receiver capable of real‐time high‐throughput information transmission with ASCII code under 9600 baud rate. This work provides the design insight of highly performing self‐powered photodetectors to achieve high‐efficiency optical communication in the future.

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“…An increase in grain size leads to decreased grain boundaries, enhanced crystallinity, and charge transport, which alleviates the undesirable charge recombination. [39] Furthermore, the film with the modification of Al 2 O 3 has larger surface roughness, as shown in Figure S14a-d The increased roughness will enlarge the crystal grains and reduce the voids in-between perovskite grains, which decreases the surface recombination centers, thereby suppressing the non-radiative recombination at the interface. On the other hand, the hole carries can transport through the space between Al 2 O 3 nanoparticle which is infilled by perovskite.…”

Section: Morphology Improvement and Better Energy Level Alignmentmentioning

confidence: 99%

Buried Interface Dielectric Layer Engineering for Highly Efficient and Stable Inverted Perovskite Solar Cells and Modules

Xie

Wang

et al. 2023

Advanced Science

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Stability and scalability are essential and urgent requirements for the commercialization of perovskite solar cells (PSCs), which are retarded by the non‐ideal interface leading to non‐radiative recombination and degradation. Extensive efforts are devoted to reducing the defects at the perovskite surface. However, the effects of the buried interface on the degradation and non‐radiative recombination need to be further investigated. Herein, an omnibearing strategy to modify buried and top surfaces of perovskite film to reduce interfacial defects, by incorporating aluminum oxide (Al2O3) as a dielectric layer and growth scaffolds (buried surface) and phenethylammonium bromide as a passivation layer (buried and top surfaces), is demonstrated. Consequently, the open‐circuit voltage is extensively boosted from 1.02 to 1.14 V with the incorporation of Al2O3 filling the voids between grains, resulting in dense morphology of buried interface and reduced recombination centers. Finally, the impressive efficiencies of 23.1% (0.1 cm2) and 22.4% (1 cm2) are achieved with superior stability, which remain 96% (0.1 cm2) and 89% (1 cm2) of its initial performance after 1200 (0.1 cm2) and 2500 h (1 cm2) illumination, respectively. The dual modification provides a universal method to reduce interfacial defects, revealing a promising prospect in developing high‐performance PSCs and modules.

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Evaluation of the Passivation Effects of PEDOT:PSS on Inverted Perovskite Solar Cells

Cited by 53 publications

References 168 publications

Significantly Improved Efficiency and Stability of Pure Tin-Based Perovskite Solar Cells with Bifunctional Molecules

Significantly Improved Efficiency and Stability of Pure Tin-Based Perovskite Solar Cells with Bifunctional Molecules

Boosting Charge Utilization in Self‐Powered Photodetector for Real‐Time High‐Throughput Ultraviolet Communication

Buried Interface Dielectric Layer Engineering for Highly Efficient and Stable Inverted Perovskite Solar Cells and Modules

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