A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests

Filename: helpers/my_audit_helper.php

Line Number: 143

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 994
Function: getPubMedXML

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3134
Function: GetPubMedArticleOutput_2016

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

Overcoming Charge Confinement in Perovskite Nanocrystal Solar Cells. | LitMetric

AI Article Synopsis

  • Small nanoparticle size and long-chain ligands in colloidal metal halide perovskite quantum dots (PeQDs) limit charge movement, leading to low current density in solar cells and hindering their overall efficiency.
  • A new re-assembling process for perovskite nanocrystalline (PeNC) films enhances crystallite size and removes long-chain ligands, improving charge mobility and exciton dissociation.
  • This method results in a significant increase in current density (J = 19.30 mA/cm) and a power conversion efficiency (PCE) of 16.46%, while maintaining good stability and minimal performance loss, suggesting a promising approach for advanced optoelectronic devices.

Article Abstract

The small nanoparticle size and long-chain ligands in colloidal metal halide perovskite quantum dots (PeQDs) cause charge confinement, which impedes exciton dissociation and carrier extraction in PeQD solar cells, so they have low short-circuit current density J , which impedes further increases in their power conversion efficiency (PCE). Here, a re-assembling process (RP) is developed for perovskite nanocrystalline (PeNC) films made of colloidal perovskite nanocrystals to increase J in PeNC solar cells. The RP of PeNC films increases their crystallite size and eliminates long-chain ligands, and thereby overcomes the charge confinement in PeNC films. These changes facilitate exciton dissociation and increase carrier extraction in PeNC solar cells. By use of this method, the gradient-bandgap PeNC solar cells achieve a J = 19.30 mA cm without compromising the photovoltage, and yield a high PCE of 16.46% with negligible hysteresis and good stability. This work provides a new strategy to process PeNC films and pave the way for high performance PeNC optoelectronic devices.

Download full-text PDF

Source
http://dx.doi.org/10.1002/adma.202304533DOI Listing

Publication Analysis

Top Keywords

solar cells
20
penc films
16
charge confinement
12
penc solar
12
long-chain ligands
8
exciton dissociation
8
carrier extraction
8
penc
8
solar
5
cells
5

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!